Earth chestnut is a perennial herb producing small, edible tubers. It is grown for its tubers and as a wildflower. Inputs Hardiness zone 41 Hardiness zone 51 Hardiness zone 61 Hardiness zone 71 Hardiness zone 81 Outputs Human food2 Type Herb Perennial Footnotes Bunium bulbocastanum | Plants for a Future ↩ ↩2 ↩3 ↩4 ↩5 Gaia’s Garden - A Guide to Home-Scale Permaculture, 2nd Edition Table 10-1 ↩