Koa ( Acacia koa A. Gray [Fabaceae]) seedlings were grown with subirrigation and overhead irrigation systems in an effort to characterize post-nursery field performance. One year following outplanting, we found no differences in seedling height or survival, but root-collar diameter was significantly larger for subirrigated seedlings. This indicates that koa seedlings, with equal or better
... [Show full abstract] morphological quality compared with overhead irrigated seedlings, can be effectively produced using subirrigation systems, thus allowing for potential reductions in water use and wastewater during nursery culture.