Spanish Chestnut, once established, is tolerant of drought. It does best in sandy, well drained soils and is highly tolerant of acidic soils. If kept too dry when young, Spanish chestnut may remain as a shrub and never grow to tree size. Chestnuts are generally propagated by budding or grafting on seedling stock. The seedlings are produced by sowing fresh seeds. Dried seeds may not germinate. Chestnuts have both male and female flowers on the same tree but they are largely self-incompatible so you need at least two trees to get nuts. Chestnuts have less oil and more starch than most nuts and so are used differently in cooking.