Oca is a perennial plant producing small, colorful tubers with a tangy flavor. It is grown for its edible tubers and as a ground cover. Inputs Hardiness zone 61 Hardiness zone 71 Hardiness zone 81 Hardiness zone 91 Outputs Human food2 Type Plant Perennial Functions Ground cover Footnotes Oxalis tuberosa | Plants for a Future ↩ ↩2 ↩3 ↩4 Gaia’s Garden - A Guide to Home-Scale Permaculture, 2nd Edition Table 10-1 ↩