I was amazed last week to discover that two Jicama plants I plonked in the ground late last year had actually produced tubers. Jicama or Mexican Yam Bean is a tropical, climbing bean from Mexico grown for its big, turnip-like roots rather than its bean pods. Although it looks like a normal climbing bean, the flowers and pods are poisonous and contain rotenone. I grew my two specimens in late spring so they were still quite young plants by mid Summer and for some reason I discounted the idea that they would produce the big "yams" by late autumn. I had scratched around a bit in the soil and had felt nothing and so hoped that the plants would re-sprout and produce good sized roots for 2011.