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New evidence on the introduction, cultivation
and processing of hemp (Cannabis sativa L.)
in southern Sweden
Mikael Larsson1, Per Lagerås2
1
Department of Archaeology and Ancient History, University of Lund, Sweden,
2
The Swedish National Heritage
Bord, Lund, Sweden
Subfossil remains of Cannabis sativa L. (hemp) have been found at Lindängelund in the region of Malmö,
southern Sweden. These represent the earliest robust evidence so far for hemp retting in Scandinavia.
Finds of seeds, stems and pollen of C. sativa from a waterlogged context on a settlement dating to the
Roman Iron Age demonstrate that the plant was locally cultivated and processed during the 1st–2nd
centuries AD. An introductory phase in Scandinavia is proposed (c. AD 1–400) during which the
cultivation of hemp was apparently small scale and processing was probably carried out within
settlements. In the succeeding centuries, c. AD 400–550 (the Migration Period), remains of hemp are
mostly found in pollen records from lake sediments, and less frequently in the archaeological record. This
could indicate that the process of hemp retting relocated from settlements to lakes shores where activity
became larger in scale and more integrated with the prevailing agricultural system.
Keywords: Cannabis sativa, Hemp, Retting, Roman Iron Age, Sweden, Scandinavia
Introduction
Hemp (Cannabis sativa L.) is an important cultural
plant used for a variety of products and purposes. In
the past, hemp fibre was particularly valued for its
strength and durability, being coarser than fibres
from flax (Linum usitatissimum L.). Its fruits have
chiefly been used for food and to make hempseed
oil, while a psychotomimetic resin secreted by epider-
mal glands has medicinal and narcotic properties. The
latter is difficult to prove based on the archaeological
and palaeoecological record and therefore the discus-
sion of its early use has focused upon fibre and food
production.
Textiles and ropes made from hemp are highly per-
ishable and consequently material evidence for the use
of hemp fibre is limited in the archaeological record.
The earliest finds in northern Europe are represented
by products of rope dating to 800 BC in Scotland
and textiles dating to 500 BC in southwestern
Germany (Körber-Grohne 1988; Ryder 1999). These
hemp products demonstrate the early use of the
plant in these areas, but cannot provide evidence
regarding their provenance. Palynological records of
Cannabis pollen are, on the contrary, good indicators
for the local growing of hemp. They may indicate cul-
tivation near the sampling point or, if the pollen per-
centages are high, they may reflect the retting of the
stems. Also macroscopic plant remains provide good
evidence of local handling of the plant. Such remains
may be charred or subfossil fruits uncovered from
archaeological contexts or fragments of stems orig-
inating from retting or fibre processing.
Based on previous evidence, hemp cultivation is
generally presumed to have begun in Scandinavia
sometime after the mid-1st millennium AD, as indi-
cated by pollen records (Påhlsson 1981; Dörfler
1990; Fleming and Clarke 1998). It is not until the
end of the first millennium AD and the succeeding
Middle Ages that hemp (seeds and pollen) becomes
well represented on sites across Scandinavia (Fries
1962; Gaillard and Göransson 1991; Lempiäinen
1995, 1999; Moltsen 2000; Hall and Kenward 2003;
Karg 2007, 2012).
The recently discovered Cannabis plant remains
(stem fragments, fruits and pollen) presented in this
paper provide strong evidence of hemp cultivation as
well as fibre processing in southern Scandinavia had
already begun during the second century AD, and
possibly slightly earlier. The new results will be dis-
cussed within a wider agrarian perspective.
Correspondence to: Mikael Larsson, Department of Archaeology and
Ancient History, University of Lund, Sandgatan 1, 223 50 Lund, Sweden.
Email: mikael.larsson@ark.lu.se
© Association for Environmental Archaeology 2014
DOI 10.1179/1749631414Y.0000000029 Environmental Archaeology 2014 VOL. 0NO. 01
Background
Plant Physiology and Taxonomy
Cannabis are dioecious annual herbaceous plants in a
family (Cannabaceae) which contains only one other
genus –Humulus. Male plants bear staminate flowers
arranged in panicles and produce large quantities of
pollen; the female flowers grow in leafy spikes in the
leaf axils. All known strains of Cannabis are wind pol-
linated and pistillate flowers of the female plant can
produce hundreds of fruits (Clarke 1993; Van der
Werf 1994, 3–4; Barron et al. 2003).
On a morphological basis, Cannabis is divided into
three species: C. sativa L., C. indica Lam. and C.
ruderalis Janisch (Schultes et al. 1974).Hemp, C.
sativa L., is grown for its fibre to produce textiles
and originates from central Asia. C. indica Lam. is cul-
tivated for its pharmaceutical properties and is indi-
genous to Central and Eastern Asia, whereas C.
ruderalis (syn. C. sativa var. spontanea) is a hardier
species originating in central Russia.
Early Cultivation and Use of Hemp in
Scandinavia
The domestication, early use and spread of hemp from
Asia to Europe have been discussed by several authors
(Godwin 1967b; Li 1974a, 1974b, Lu and Clarke 1995;
Mercuri et al. 2002). Its introduction to Scandinavia is,
however, still unclear due to scarce finds. In
Scandinavia most evidence of the cultivation and pro-
cessing of hemp comes from the palynological record.
The pollen grains are usually identified as Cannabis
type, which includes both Cannabis and Humulus,
since pollen of these two genera are very difficult to
distinguish (Moore et al. 1991).
Several diagrams show single pollen grains of
Cannabis type from the Early Holocene onwards.
Such very low frequencies (below 1%) from early
periods are usually interpreted as originating from
native wild-growing hops (Humulus sativa) (e.g.
Berglund 1991). According to macrofossil finds and
written documents, the cultivation of hops (to be
used as beer additive) was introduced to Scandinavia
around AD 1000 (Behre 1999), but because hops are
poor pollen producers, the cultivation of hops is
believed to contribute very little to the pollen record.
In contrast to these scattered and sometimes very
early appearances, some pollen diagrams show very
high frequencies of Cannabis type in the Late
Holocene, which are interpreted as reflecting the
growing and retting of hemp (C. sativa). Cannabis
type may reach 40% or more of the total pollen sum
(Regnéll 1989; Gaillard and Göransson 1991). In at
least one case also the occurrence of black sulphite
gyttja at the same levels as high Cannabis-type percen-
tages was used as an indication of retting (Regnéll
1989).
The identification of high pollen percentages (>5%)
of Cannabis type is probably a reliable indication of
the processing or nearby cultivation of hemp.
However, dating is more problematic. Today it is
well known that radiocarbon dates performed on
bulk gyttja samples give erroneously old dates due to
the so-called reservoir effect (Olsson 1986, 1991).
The error may vary from one hundred to several
hundred years (Lagerås 1996). To avoid this
problem, modern pollen studies use terrestrial macro-
fossils found in the sediment or bulk peat samples
for radiocarbon dating. High frequencies of
Cannabis-type pollen have been dated to approxi-
mately AD 400–1000 at several sites (Fries 1962;
Påhlsson 1981; Regnéll 1989; Gaillard and
Göransson 1991; Robertsson 1992; Rasmussen and
Anderson 2005), but because the chronologies are
based on radiocarbon dating of bulk gyttja or by
cross correlation with other sites, it is often difficult
to establishan exact date for the introduction of
hemp cultivation. For the same reason, the very
early pollen records of hemp (300 BC) from the Oslo
Fjord area published by Godwin (1967a) have to be
regarded as tentative. In cases where detailed chronol-
ogies have been established based on AMS dating of
terrestrial macrofossils or peat, high pollen percen-
tages of Cannabis type have been recorded in the
11th century or later (Göransson 1989; Rasmussen
2005; Lagerås 2007; Sköld et al. 2010). To sum up
the evidence from the pollen record: hemp was culti-
vated in Scandinavia possibly from the 5th century
onwards and certainly from the 11th century onwards.
Cannabis fruits are rare on archaeological sites in
Scandinavia and finds from before AD 1000 are very
scarce. The earliest records are from Denmark at
Kragehavegård (AD 375–550), followed by Strandby
Gammeltoft (AD 650–1000) and Næs (AD 750–900;
Andresen and Karg 2011). A few fruits were recovered
from the Oseberg ship (found in a 9th century AD
burial mound in southern Norway; Holmboe 1927),
whilst the earliest seed dates to AD 800–1000 in
Finland from Hämeenlinna (Lempiäinen 1999). An
imprint of a Cannabis fruit on a ceramic vessel from
a Viking Age grave at Karby, Vendel is the earliest
in Sweden (Hansson 1998). During the Middle Ages
(AD 1050–1500) plant remains from Cannabis
become widely represented in the archaeological
record across Scandinavia (Fries 1962; Gaillard and
Göransson 1991; Lempiäinen 1999; Hall and
Kenward 2003; Karg 2012), in both rural and urban
contexts (Lempiäinen 1995; Moltsen 2000;
Engelmark 2002; Karg 2007).
Relatively few commodities made from hemp have
been discovered in Scandinavia date to the Iron Age,
i.e. from before AD 1050. The remains of the Oseberg
ship include coarse textiles that have been tentatively
Larsson and Lagerås New evidence on the introduction, cultivation and processing of hemp
Environmental Archaeology 2014 VOL . 0NO. 02
interpreted as the remains of sail cloth made from hemp
(Holmboe 1927). Pliny the Elder had earlier prized the
great sail cloths made from flax and used by seafarers
on the Mediterranean Sea, and acknowledged that
flax sail cloths were made in all of the Gallic provinces
(Naturalis Historia, 19.1.1–2·15). The point at which
sailsstartedtobemadefromhempis,however,
unclear. The extent to which sail cloths in Scandinavia
were made from flax or hemp is unknown, although
wool was largely used for this purpose during the first
millennium AD (Andersson 2003: 49–54).
Excavation Site
The archaeological site Lindängelund in the region of
Malmö, southern Sweden, was subject to excavation in
2010 (Fig. 1 & 2). The site revealed settlement remains
from two different occupation periods –the Early
Roman Iron Age (AD 1–200) and the transition
between the Viking Period and the beginning of the
Middle Ages (AD 900–1100) –both represented by
small farms. Adjacent to the settlements was a water-
logged area with several wells and pit features. Most
of these correspond with the settlement phase of the
Roman Iron Age and the Viking Period/Early
Middle Ages. The waterlogged features revealed an
abundance of artefacts and household waste, reflecting
both ordinary settlement activities and ritual deposits
(Carlie and Lagergren 2014).
Sample Context
From the excavation site a total of 18 soil samples were
analysed for macrofossils and 5 for pollen
(Supplementary materials 1 and 2). The samples
were taken from dwelling areas and waterlogged con-
texts. In focus for this paper is the analysis of two
small pits (labelled A74494 and A74539; Fig. 3)
which were discovered at the bottom of a larger water-
logged feature (A152645). The sediment fill was highly
organic and was sampled for both macrofossil and
pollen analysis. Archaeological finds from the two
pits consisted mainly of shards of Early Iron Age
pottery and bone fragments from domestic animals
(cattle, sheep/goat, pig, horse and dog).
Method
Bulk soil samples, ranging in volume from 0·1to2·0l,
collected during the excavation were processed with
running water and sieved over a 0·4-mm mesh.
Macrofossils caught in sieve residues consisted of
both charred and uncarbonised material and were
identified using a microscope (×6·3–63), a reference
collection of modern seeds, and the relevant literature
(Cappers et al. 2006; Jacomet 2006). Pollen samples
were prepared using standard methods (Berglund
and Ralska-Jasiewiczowa 1986) and mounted in
glycerine. Pollen grains were identified using a light
microscope (×400–1000), a pollen reference collection,
and identification keys (Moore et al. 1991).
Results
Dating
A fruit of C. sativa from A74494 was radiocarbon
dated to cal. AD 20–220 (2σ), and seeds of
Ranunculus and Chenopodium from A74539 were
dated to cal. 160 BC–AD 80 (Table 1). The calibrated
2 sigma intervals of the two dates overlap AD 20–80,
Figure 1 Location of Lindängelund in southwestern Scania, Sweden. (Inset) The study area (boxed) within northern Europe.
Larsson and Lagerås New evidence on the introduction, cultivation and processing of hemp
Environmental Archaeology 2014 VOL . 0NO. 03
represent the Early Roman Iron Age, but their age
could be much earlier: Ua-29841 may be as old 160
BC. The dates correspond with pottery from the
same contexts, dated by typology, as well as to the
dating of house remains situated close by (Carlie and
Lagergren 2014).
Macrofossil Analysis
Feature A152645, with sub-features A74494 and
A74539, was located in a wetland area that today is
largely absent of standing water, but its former water-
logged nature is evident from saturated layers of mud
and gyttja. Two samples from the bottom of A74494
and A74539 were analysed for macrofossils and the
results are presented in Table 2.
Sample PM75759 from A74494 contained 146 sub-
fossil fruits of C. sativa and some fruit capsules
(Fig. 4). In addition, a substantial amount of stem
fragments were present in the sample. The stems
were lacking any dark flecking from fungi (Fig. 5).
Sample PM78033 from A74539 contained no macro
remains of Cannabis, whereas samples from both
A74494 and A74539 revealed Cannabis-type pollen
(see below).
Fruits of the aquatic plants common water-crowfoot
(Ranunculus aquatilis) and trifid bur-marigold (Bidens
Figure 2 Plan of the Roman Iron Age settlement at Lindängelund, showing wetland north of the dwelling area, including
excavated and analysed waterlogged feature (A152645), and excavated houses (AD 1–200) to the south.
Table 1 OxCal v4.2.3 Bronk Ramsey and Lee (2013); IntCal 13 atmospheric curve (Reimer et al. 2013)
Lab no. Feature Sample Material
14
C yr BP Cal. 2σrange
Ua-30444 A74494 PM75759 Cannabis sativa (fruit) 1907 ±35 AD 20–220
Ua-29841 A74539 PM78033 Ranunculus,Chenopodium (fruits) 2013 ±39 160 BC–AD 80
Figure 3 Plan and section of waterlogged feature A152645 showing the features and contexts sampled.
Larsson and Lagerås New evidence on the introduction, cultivation and processing of hemp
Environmental Archaeology 2014 VOL . 0NO. 04
tripartita) were identified in the macrofossil samples.
These suggest the feature formerly contained standing
water. Large numbers of rush (Juncus) fruits with
some sedge (Carex) further demonstrate the saturated
nature of the local environment.
Dry soil samples from the contemporary Roman
Iron Age houses were dominated by charred grains
of hulled barley along with some emmer wheat,
which is a typical combination of cereals from this
time period in southern Sweden.
Pollen Analysis
The results of the pollen analysis of PM75759 and
PM78033 are presented in Table 3 (pollen sums: 515
and 449, respectively). Both samples contained
pollen of Cannabis type (31·5% in PM75759 and
7·3% in PM78033). No other pollen samples from
the site revealed this taxon. Other anthropochores
identified in PM75759 and PM78033 were Cerealia
undiff., Hordeum-type and a single pollen grain of L.
usitatissimum. In addition to these cultivated taxa,
both samples were dominated by open-ground taxa
that thrive in agricultural landscapes affected by
grazing, cultivation and trampling. For instance high
percentages of Poaceae undiff. and Plantago lanceo-
lata together with the occurrence of Rhinanthus type
and some other herb pollen indicate pastures, while
high percentages of Polygonum aviculare type,
Artemisia and Chenopodiaceae reflect weeds and
ruderal plants growing in arable fields or on the settle-
ment site. Because most trees are strong pollen produ-
cers, the relatively low tree-pollen percentages indicate
an almost tree-less landscape.
Discussion
Early Evidence for Hemp Retting
The analysis of two adjacent waterlogged pits from
Lindängelund revealed that one contained fruits,
fruit capsules and stem fragments of C. sativa.
Furthermore, pollen analysis of the same two pits
revealed that both contained pollen grains of
Cannabis-type. This category includes pollen of both
C. sativa and Humulus lupulus (Moore et al. 1991)
but given that macrofossils of C. sativa were found in
the same context, it is likely that the pollen recorded
here reflects only this species.
Table 2 Result of macrofossil analysis (A74494 and A74539)
Feature 74494 Feature 74539
PM75759–0·6
(lit.)
PM78033–0·1
(lit.)
Cultivated plants
Linum usitatissimum 1
Cannabis sativa 146
Other plants
Urtica urens 16 14
Rumex acetosella 1
Rumex crispus 9
Rumex crispus 7
Polygonum aviculare 12 7
Persicaria lapathifolia 91
Fallopia convolvulus 2
Chenopodium sp. 22 5
Chenopodium album
type
46 9
Chenopodium rubrum 132 51
Arenaria serpyllifolia 12
Stellaria sp. 5
Stellaria media 1
Stellaria graminea 2
Ranunculus sp. 1
Ranunculus aquatilis
type
11 5
Brassicaceae undiff. 5
Lepidium sp. 2 2
Potenilla anserina 42
Linum catharticum 1
Hypericum perforatum 6
Solanum nigrum 73
Plantago major 10 10
Bidens cf. tripartita 9
Cirsium cf. palustre 1
Potamogeton sp. 2
Juncus sp. 93 116
Luzula 6
Carex 62
Figure 4 Cannabis sativa fruits recovered from feature
A74494. Photo by Staffan Hyll.
Figure 5 Cannabis sativa stem fragments, together with
some capsules and fruits, recovered from feature A74494.
Photo by Staffan Hyll.
Larsson and Lagerås New evidence on the introduction, cultivation and processing of hemp
Environmental Archaeology 2014 VOL . 0NO. 05
Based on information surrounding the traditional
processing of hemp in Sweden (historical documents
1764, 1774; Dahlman 1772; Fröier 1960), the hemp
stems found here are interpreted as by-products from
fibre production. More specifically, they reflect the
stage when the fibre was separated from the stem, i.e.
from the beating, breaking and heckling that followed
upon retting. The fruits and capsules probably orig-
inate from the same process.
Retting is a microbial process that breaks down cel-
lular tissues and pectin and allows separation of the
bast fibres from the core. This involves either water
retting or dew retting (Bradshaw et al. 1981; Cox
et al. 2000). Water retting can be done in small,
shallow ponds of standing water which are warmed
by sunlight, but the same process can also take place
in lakes or streams. The stems are left to rot in the
pond for about two weeks or more, the time depending
on the type of microbes and the temperature in the
water, after which the stems are dried in the open air
before further processing.
Field or dew retting, in which hemp stems are spread
evenly over grassy fields, is a method used in areas
where water resources are limited. This is best suited
to areas which experience thick night-time dew or
warm daytime temperatures. Flecking of dark spots
on the stems, primarily representing the growth of
the fungus Cladosporium herbarum, becomes more
numerous and spreads during the retting process until
the whole stem becomes grey in colour. The fungi are
considered to be the retting agent for field retted
hemp (Fuller and Norman 1944). Depending on the
prevailing climate, the fibre can be separated after
about two to three weeks. Field-retted fibre is darker
and usually of poorer quality than water-retted fibre.
At Lindängelund, the absence of dark flecking on
the stems from fungi suggests that the hemp was not
field or dew-retted but rather placed in water. In the
absence of nearby lakes or streams, retting most
likely took place in the dug pits that were investigated.
Prior to this study, evidence of early retting of hemp
in Scandinavia was almost exclusively based on paly-
nological records with high pollen percentage of
Cannabis type (e.g. Bradshaw et al. 1981; Peglar
et al. 1989; Gaillard and Göransson 1991;
Rasmussen 2005; Rasmussen and Anderson 2005;
Schofield and Waller 2005). The Cannabis-type
pollen found in both pits at Lindängelund may orig-
inate, in part, from pollen washed off the plant
during the retting process. C. sativa is a prolific
pollen producer and wind dispersal from nearby
hemp fields may also have contributed to the pollen
record. A possible interpretation would be that hemp
retting, after an introductory phase, was moved from
settlements to lake shores as it became a more substan-
tial activity from the Migration Period (AD 400–550)
onwards. One reason could be the need for more
water, another that larger water bodies were sought
out to handle the larger hemp stems. Edwards and
Whittington (1990) note that retting hemp creates a
foul smell, and this could be another possible reason
why people wanted to distance this activity from
their homes. A drawback would have been the colder
water of lakes in comparison to shallow pits, resulting
in a slower retting process.
Table 3 Results of pollen analysis (PM75759 and PM 78033)
PM75759 PM78033
Counts % Counts %
Trees, shrubs and dwarf
shrubs
Betula 30·671·6
Pinus 12 2·3194·2
Populus 10·2
Alnus 17 3·3204·5
Quercus 71·471·6
Ulmus 10·210·2
Fagus 20·420·4
Picea 30·6
Myrica gale 30·7
Corylus 71·420·4
Calluna vulgaris 20·4
Cultivated plants
Cerealia undiff. 4 0·810·2
Hordeum type 18 3·540·9
Cannabis type 162 31·5337·3
Linum usitatissimum 10·2
Other herbs
Fallopia convolvulus type 1 0·2
Persicaria maculosa type 3 0·7
Polygonum aviculare type 8 1·6224·9
Rumex acetosa/acetosella 61·281·8
Rumex obtusifolius type 3 0·6
Caryophyllaceae 1 0·2
Ranunculaceae undiff. 3 0·7
Ranunculus type 1 0·230·7
Hornungia type 6 1·230·7
Sinapis type 2 0·4
Rosaceae undiff. 2 0·440·9
Filipendula 10·230·7
Potentilla type 3 0·630·7
Fabaceae undiff. 2 0·410·2
Trifolium type 1 0·2
Vicia type 2 0·4
Apiaceae 4 0·820·4
Galium type 8 1·630·7
Mentha type 1 0·261·3
Rhinanthus type 2 0·420·4
Plantago lanceolata 14 2·7204·5
Plantago major 30·6
Scabiosa 10·2
Jasione type 1 0·2
Anthemis type 3 0·620·4
Artemisia 22 4·3204·5
Aster type 1 0·220·4
Centaurea scabiosa 81·681·8
Cirsium 20·4
Asteraceae Lactucoideae 45 8·7449·8
Cyperaceae 11 2·1163·6
Poaceae undiff. 93 18·1 138 30·7
Chenopodiaceae 24 4·727 6
POLLEN SUM 515 449
Spores
Equisetum 5140·9
Polypodiaceae 3 0·640·9
Sphagnum 20·4
Larsson and Lagerås New evidence on the introduction, cultivation and processing of hemp
Environmental Archaeology 2014 VOL . 0NO. 06
Growth, Production and Harvesting
Cultivation of hemp was probably a new agricultural
activity in northern Europe during the first centuries
AD. Introducing a new cultivar involved both knowl-
edge of hemp fibre and cultivation requirements of the
plant. Careful monitoring during the harvesting
period had to be considered as male and female
flowers of hemp develop on separate plants. Male
plants begin to decay soon after anthesis, while
female plants can live from two to five weeks longer,
until the fruit is ripe (Stearn 1970). For this reason,
the time of flowering was an important factor in gov-
erning when to harvest, particularly as the stem quality
of male plants starts to decline after flowering as the
plant gradually whithers and dies. This may result in
two different harvesting times for the same field. At
Lindängelund, both male and female plants were cul-
tivated and handled on the site, as reflected by finds of
both pollen and fruits respectively, but it is unclear if
male plants were harvested and retted prior to the
maturation of female stems, or if they were stored
before retting all stems together.
Successful cultivation of hemp would have required
access to fertile soils and a source of manure as nutri-
ent-rich soils are needed to achieve high yields and
fibre of high quality (Broocman 1736; historical docu-
ments 1737a, 1764; Dahlman 1772; Osvald 1944,
1959; Vavilov 1992). Hemp’s demands for nitrogen,
calcium and phosphorus are high (Barron et al.
2003), and a lack of nitrogen especially can result in
reduced growth and smaller yields.
By the time hemp was introduced to Scandinavia in
the Early Roman Iron Age, the agrarian system was
based on self-sufficient single farms practicing mixed
farming (Engelmark and Viklund 1990). Stabling
was introduced a few centuries earlier and had
become common (Engelmark 1998; Viklund 1998),
providing ready access to manure. The demand for fer-
tiliser suggests that farms involved in hemp cultivation
also depended heavily on animal husbandry, at least
for inland sites. But in coastal areas, seaweed was
also commonly used as a fertilizer (Whittington and
Edwards 1990). Furthermore, according to the 18th-
century literature on hemp cultivation, the plant had
additional beneficial properties, and was renowned
for producing a permeable soil for succeeding crops
and for suppressing weed growth (historical document
1764).
Conclusion
The macrofossil remains of C. sativa and pollen of
Cannabis type that were discovered at Lindängelund,
southern Sweden and dated to the Early Roman Iron
Age, provide the earliest definitive evidence for hemp
retting in Scandinavia. The retting took place within
waterlogged pits beside a dwelling area. This may
reflect an ‘introductory phase’during which hemp pro-
cessing was a small-scale operation and was carried
out on settlements. Subsequently, the general scarcity
of archaeological finds of hemp, in combination with
relatively plentiful palynological records for
Cannabis from lakes, indicates that the process of
hemp retting may have moved from settlements to
lakes shores.
Results from Lindängelund indicate that hemp was
introduced to this location for production of fibre.
Although other possible uses of the plant –for food,
oil or medical purposes –cannot be excluded, the
general scarcity of hemp fruits from settlement con-
texts indicates that these were of minor importance.
This differs from flax, which was used for both fibre
and food/oil throughout the Iron Age.
Acknowledgements
We wish to thank Dominic Ingemark and Eva
Andersson for fruitful discussions and the two anon-
ymous reviewers for suggesting improvements to the
manuscript.
Historical Documents
1737a. Kongl. maj:ts och riksens commercie collegii
författade beskrifning, på hwad sätt hampe-sädet bör
giöras, och huru dermed skal förfaras, så at, til
underdånigst följe af kongl. maj:ts, i anledning af
riksens ständers åstundan, förklarade nådige wilja,
hampan til fullkommelig wäxt och längd, må kunna
bringas. Stockholm.
1737b. Kongl. Maj:ts Nådige Kundgiörelse,
Angående Hampe-Sädets befrämjande uti Riket.
Gifwen Stockholm i Råd-Cammaren then 15 Febr.
1737. Stockholm.
1752. Underrättelse om sättet, at bereda lin och
hampa. Stockholm.
1764. Underrättelse om sättet at behörigen plantera
och bereda hampa och lin, uppå hans kongl. maj:ts
nådigste befallning til trycket befordrad, af desz och
riksens commerce-collegio. Stockholm.
1774. Beskrifning om hampa, des såning, skötsel
och beredning på et fördelaktigare sätt, efter kongl.
Maj:ts allernådigaste befalning, uppå dess rikens com-
merce-collegii föranstaltande författad. Stockholm.
References
Andersson, E. 2003. Tools for textile production from Birka and
Hedeby: excavations in the black earth 1990–1995. Birka
Studies 8, Stockholm. 20–21.
Andresen, S. T. and Karg, S. 2011. Retting pits for textilefibre plants
at Danish prehistoric sites dated between 800 BC and AD 1050.
Vegetation History and Archaeobotany 20, 517–26.
Barron, A., Coutinho, J., Gergely, S. and Lidouren, E. 2003.
Integrating Hemp in Organic Farming System: A Focus on the
United Kingdom, France and Denmark. Copenhagen: The
Royal Agricultural and Veterinary University.
Behre, K-E. 1999. The history of beer additives in Europe –a review.
Vegetation History and Archaeobotany 8,35–45.
Larsson and Lagerås New evidence on the introduction, cultivation and processing of hemp
Environmental Archaeology 2014 VOL . 0NO. 07
Berglund, B. E. (ed.) 1991. The Cultural Landscape During 6000
Years in Southern Sweden –The Ystad Project. Ecological
Bulletins 41. Munksgaard International Booksellers and
Publishers, Copenhagen.
Berglund, B. E. and Ralska-Jasiewiczowa, M. 1986. Pollen analysis
and pollen diagrams, pp. 455–84 in Berglund, B. E. (ed.),
Handbook of Holocene Palaeoecology and Palaeohydrology.
Chichester: Wiley.
Bradshaw, R. H. W., Coxon, P., Greig, J. R. A. and Hall, A. R. 1981.
New fossil evidence for the past cultivation and processing of
hemp (Cannabis sativa L.) in eastern England. New
Phytologist 89, 503–10.
Bronk Ramsey, C. and Lee, S. 2013. Recent and planned develop-
ments of the program OxCal. Radiocarbon 55(2–3), 720–30.
Broocman, R. 1736. En fulständig Swensk Hus-hålls-bok.
Norrköping.
Cappers, R. T. J., Bekker, R. M. and Jans, J. E. A. 2006. Digitale
Zandenatlas van Nederland. Groningen: Barkhuis Publishing.
Carlie, A. and Lagergren, A. 2014. Lindängelund
1. Riksantikvarieämbetet, UV Rapport 2014:36.
Carlie, A. and Lagergren, A. 2014. Lockarp 44:1 m fl
(Lindängelund 1), Basdokumentation, Bebyggelse och offer-
plats från yngre stenålder, bronsålder, järnålder samt vikinga-
tid/tidig medeltid, Skåne, Malmö kommun, Bunkeflo socken,
RAÄ Bunkeflo 77:1, 78:1, 150, 151, 152 och 153.
Riksantikvarieämbetet, Lund, UV Rapport 2014:36.
Clarke, R. C. 1993. Marijuana Botany: An Advanced Study: The
Propagation and Breeding of Distinctive Cannabis. Oakland:
Ronin Publishing.
Cox, M., Chandler, J., Cox, C., Jones, J. and Tinsley, H. 2000. Early-
medieval hemp retting at Glasson Moss, Cumbria in the
context of the use of Cannabis sativa during the historic
period. Transactions of the Cumberland & Westmorland
Antiquarian & Archaeological Society 100, 131–50.
Dahlman, C. E. 1772. Swenska red-dejan eller wälöfwada
hushållers-kan. Printed at Johan Laur. Horrn, Wästerås.
Dörfler, W. 1990. Diegeschichte des hanfanbaus in Mittleeuropa auf
grund palynologischer untersuchungen und von grossrestnach-
weisen. Praehistorische Zeitschrift 65, 218–44.
Edwards, K. J. and Whittington, G. (1990) Palynological evidence
for the growing of Cannabis sativa L. (hemp) in medieval and
historical Scotland. Transactions of the Institute of British
Geographers 15,60–9.
Engelmark, R. 1998. Fähus i förhistorien. En miljöhistorisk intro-
duktion, pp. 7–13 in Viklund, K., Engelmark, R. and
Linderholm, J. (eds.), Fähus. Från bronsålder till idag. Skrifter
om skog- och lantbrukshistoria 12. Lund: Nordiska museet.
Engelmark, R. 2002. The dark earth of Sigtuna, pp. 49–58 in
Viklund, K. (ed.), Nordic Archaeobotany –NAG 2000 in
Umeå. Archaeology and Environment 15, VMC KBC Umeå
Universitetet.
Engelmark, R. 2002. The dark earth of Sigtuna, pp. 49–58 in
Viklund, K. (ed.), Nordic Archaeobotany –NAG 2000 in
Umeå. Archaeology, Environment 15, Department of
Archaeology and Sami studies, University of Umeå, Umeå.
Engelmark, R. and Viklund, K. 1990. Makrofossilanalys av växtres-
ter –kunskap om odlandets karaktär och historia.
Bebyggelsehistorisk tidskrift 19,33–41.
Fleming, M. P. and Clarke, R. C. 1998. Physical evidence for the
antiquity of Cannabis sativa L. (Cannabaceae). Journal of the
International Hemp Association 5,80–92.
Fries, M. 1962. Studies of the sediments and the vegetational history
in the Ösbysjö Basin, North of Stockholm. Oikos 13,76–96.
Fröier, K. 1960. Lin och hampa. Nutida svensk odling, beredning och
användning. Stockholm: LTs förlag.
Fuller, W. H. and Norman, A. G. 1944. The nature of the flora on
field-retting hemp. Soil Science Society Proceedings 1944,
101–5.
Gaillard, M-J. and Göransson, H. 1991. The Bjäresjö area, pp.
167–74 in Berglund, B.E. (ed.), The Cultural Landscape
During 6000 Years in Southern Sweden. Ecological Bulletins
41, Munksgaard International Booksellers and Publishers
Copenhagen.
Godwin, H. (1967a) Pollen-analytic evidence for the cultivation of
Cannabis in England. Review of Palaeobotany and Palynology
4,71–80.
Godwin, H. (1967b) The ancient cultivation of hemp. Antiquity 41,
42–9.
Göransson, H. 1989. Dags mosse –Östergötlands förhistoriska
kalender. Svensk Botanisk Tidskrift 83, 371–407.
Hall, A. and Kenward, H. 2003. Assessment of plant and invert-
ebrate macrofossil remains from excavations in 2002 at
Kaupang, Norway. Reports from the centre for human palaeoe-
cology. University of York. The King’s Manor, York.
Hansson, A-M. 1998. Archaeobotanical investigations at Vendel
and Valsgärde. Journal of Nordic Archaeological Science
10–11,5–16.
Holmboe, J. 1927. Nytteplanter og ugræs i Osebergfundet, pp. 3–80
in Brøgger, A.W. and Schetelig, H. (eds.), Osebergfundet, vol. 5.
Den Norske Stat, Universitets Oldsaksamling, Oslo.
Jacomet, S. 2006. Identification of Cereal Remains from
Archaeological Sites (2nd edition). Archaeological Lab, IPAS,
Basel University. Unpublished compendium.
Karg, S. 2007. Medieval Food Traditions in Northern Europe.
Publications from the National Museum. Studies in
Archaeology and History Vol. 12, Denmark.
Karg, S. 2012. Oil-rich seeds from prehistoric contexts in southern
Scandinavia –reflections on archaeobotanical records of flax,
hemp, gold of pleasure, and corn spurrey. Acta
Palaeobotanica 52,17–24.
Körber-Grohne, U. 1988. Microscopic methods for identification of
plant fibres and animal hairs from the prince’s tomb of
Hochdorf, southwestern Germany. Journal of Archaeological
Science 15,73–82.
Lagerås, P. 1996. Long-term history of land-use and vegetation at
Femtingagölen: a small lake in the Småland Uplands, southern
Sweden. Vegetation History and Archaeobotany 5, 215–28.
Lagerås, P. 2007. The Ecology of Expansion and Abandonment:
Medieval and Post-Medieval Land-Use and Settlement
Dynamics in a Landscape Perspective. Stockholm:
Riksantikvarieämbetet.
Lempiäinen, T. 1995. Medival plant remains from the fortress of
Kakisalmi, Karellia (Russia). Fennoscandia archaeologica 12,
83–95.
Lempiäinen, T. 1999. On the history of hemp (Cannabis sativa L.),
pp. 71–8inFinland and the Archaeobotanical Evidence.
Festschrift of Kerstin Griffin, Stavange Archaeological
Museum, AMS Rapport 12 A.
Lempiäinen, T. 1995. On the history of hemp (Cannabis sativa L.),
pp. 71–78 in Selsing, L. and Lillehammer, G. (eds.), Finland
and the archaeobotanical evidence. Festschrift of Kerstin
Griffin, Stavange Archaeological Museum, AMS Rapport 12
A, Stavanger.
Li, H-L. 1974a. The origin and use of Cannabis in Eastern Asia
Linguistic-cultural implications. Economic Botany 28, 293–301.
Li, H-L. 1974b. An archaeological and historical account of
Cannabis in China. Economic Botany 28, 237–448.
Lu, X. and Clarke, R.C. 1995. The cultivation and use of hemp
(Cannabis sativa L.) in ancient China. Journal of the
International Hemp Association 2,26–32.
Mercuri, A. M., Accorsi, C. A. and Mazzanti, M. B. 2002. The long
history of Cannabis and its cultivation by the Romans in
Central Italy, shown by pollen records from Lago Albano
and Lago Nemi. Vegetation History and Archaeobotany 11,
263–76.
Moltsen, A. S. A., 2000. Arkæobotanike undersøgelser fra middelal-
derbyen København –metodik og udvalgte eksempler, pp.
173–80 in Viklund, K. (ed.), Nordic Archaeobotany –NAG
2000 in Umeå. Archaeology and Environment 15, VMC KBC
Umeå Universitetet.
Moltsen, A. S. A., 2000. Arkæobotanike undersøgelser fra middelal-
derbyen København –metodik og udvalgte eksempler,
pp.173–80 in Viklund, K. (ed.), Nordic Archaeobotany –NAG
2000 in Umeå. Archaeology and Environment 15,
Department of Archaeology and Sami studies, University of
Umeå, Umeå.
Moore, P. D., Webb,J. A. and Collinson, M. E. 1991. Pollen analysis
(2nd edition). Oxford: Blackwell.
Olsson, I. U. 1986. Radiometric dating, pp. 273–312 in Berglund,
B. E. (ed.), Handbook of Holocene Palaeoecology and
Palaeohydrology, Chichester: Wiley.
Olsson, I. U. 1991. Accuracy and precision in sediment chronology.
Hydrobiologia 214,25–34.
Osvald, H. 1944. Spånads- och oljeväxter. Stockholm: Nordisk roto-
gravyrs handböcker för jordbrukare, Nordiskrotogravyr.
Osvald, H. 1959. Åkerns nyttoväxter. Stockholm: AB Svensk
litteratur.
Påhlsson, I. 1981. Cannabis sativa in Dalarna, pp. 79–82 in
Königsson, L. K. and Paabo, K. (eds.), Florilegium Florinis
Dedicatum, Striae 14. Uppsala.
Larsson and Lagerås New evidence on the introduction, cultivation and processing of hemp
Environmental Archaeology 2014 VOL . 0NO. 08
Peglar, S. M., Fritz, S. C. and Birks, H. J. B. 1989. Vegetation and
land-use history at Diss, Norfolk, U.K. Journal of Ecology
77, 203–22.
Rasmussen, P. 2005. Mid-to late-Holocene land-use change and
lake development at Dallund S0, Denmark: vegetation and
land-use history inferred from pollen data. Holocene 15,
1116–29.
Rasmussen, P. and Anderson, N. J. 2005. Natural and anthropo-
genic forcing of aquatic macrophyte development in a shallow
Danish lake during the last 7000 years. Journal of
Biogeography 32, 1993–2005.
Regnéll, J. 1989. Vegetation and Land use During 6000 Years:
Palaeoecology of the Cultural Landscape at two Lake Sites in
Southern Skåne, Sweden. Lundqua Thesis 27, Department of
Geology, Lund Univeristy, Lund.
Reimer, P. J., Bard, E., Bayliss, A., Beck, J. W., Blackwell, P. G.,
Bronk Ramsey, C., Grootes, P. M., Guilderson, T. P.,
Haflidason, H., Hajdas, I., HattŽ, C., Heaton, T. J.,
Hoffmann, D. L., Hogg, A. G., Hughen, K. A., Kaiser,
K. F., Kromer, B., Manning, S. W., Niu, M., Reimer, R. W.,
Richards, D. A., Scott, E. M., Southon, J. R., Staff, R. A.,
Turney, C. S. M. and van der Plicht, J. 2013. IntCal13 and
Marine13 radiocarbon age calibration curves 0–50,000 years
cal BP. Radiocarbon 55(4), 1869–87.
Robertsson, A-M. 1992. Vikingatida hampodling. Jämten, 183–8.
Robertsson, A.-M. 1992. Vikingatida hampodling. Jämten, 1992.
Hembygdas årsbok 85, 183–8.
Robinson, D.E. (1993): En sammenbrændt klump af hørfrø i et
førromersk kar fra Stourstrup ved Fredericia. NNU rapport
nr. 5. København.
Ryder, M. L. 1999. Probable fibres from hemp (Cannabis sativa L.)
in Bronze Age Scotland. Environmental Archaeology 4,93–5.
Schofield, J. E. and Waller, M. P. 2005. A pollen analytical record
for hemp retting from Dungeness Foreland, UK. Journal of
Archaeological Science 32, 715–26.
Schultes, R. E., Klein, W. M., Plowman, T. and Lockwood, T. E.
1974. Cannabis: an example of taxonomic neglect. Harvard
University Botanical Museum Leaflets, Harvard University 23,
337–367.
Sköld, E., Lagerås, P. and Berglund, B.E. 2010. Temporal cultural
landscape dynamics in a marginal upland area: agricultural
expansions and contractions inferred from palynological evi-
dence at Yttra Berg, southern Sweden. Vegetation History and
Archaeobotany 19, 121–36.
Stearn, W. T. 1970. The Cannabis plant: botanical characteristics,
pp. 1–10 in Joyce, C. R. B. and Currys, S. H. (eds.), The
Botany and Chemistry of Cannabis. (Proc. Ciba Foundation
Conference, April 9–10, 1969). London: Churchill.
Van der Werf, H. M. G. 1994. Crop Physiology of fibre hemp
(Cannabis sativa L.). Unpublished PhD thesis, Wageningen
Agricultural University, Wageningen, The Netherlands.
Vavilov, N. I. 1992. Origin and Geography of Cultivated Plants
(Löve, D., trans.). Cambridge: Cambridge University Press.
Viklund, K. 1998. Tidiga fähus –de arkeobotaniska beläggen, pp.
14–21 in Viklund, K., Engelmark, R. and Linderholm, J.
(eds.), Fähus. Från bronsålder till idag. Skrifter om skog- och
lantbrukshistoria 12. Lund: Nordiska museet.
Whittington, G. and Edwards, K. J. 1990. The cultivation and util-
isation of hemp in Scotland. Scottish Geographical Magazine
106, 167–73.
Larsson and Lagerås New evidence on the introduction, cultivation and processing of hemp
Environmental Archaeology 2014 VOL . 0NO. 09