In the present study, a leaf area estimation model was developed for highbush blueberries (Vaccinium corymbo-sum L.) using linear measurements, such as lamina length (L) and width (W), by stepwise regression analysis. Leaves from 9 blueberry cultivars ('Chandler' 1, 'Bluejay' 2, 'Jer-sey' 3, 'Bluegold' 4, 'Bluecrop' 5, 'Patriot' 6, 'Darrow' 7, 'Brigitta' 8, and 'Toro' 9) were used to develop the ... [Show full abstract] model. Numbers represent the cultivars (Cv). Regression analyses of leaf area (LA) versus W-1 and WxL 2 revealed several models that could be used for estimating the area of individual highbush blueberry leaves. A linear model having W-1 and WxL 2 as the independent variables, LA = a + [b x (1/W)] + [c x (W x L²)], gave the most accurate estimate, and R 2 values differing between 0.91-0.97 with regard to the highbush blueberry cultivars. Standard errors were found to be significant at the p<0.001 level. Besides a separate model for each cultivar, we also revealed a single model which could be accurately used for studied highbush blueberry cultivars as LA = (-0.5095)+[(0.6636xW 2)+ [(0.1801xL 2)]+ [(0.0033xCv 2)] with R 2 = 0.9711.