(Plectranthus rotundifolius) Also known as Kaffir Potato. This mint relative is grown for its potato-like tuber. These tubers can get very large, up to 4 lbs per plant, are very high in protein, carbohydrate, iron, and calcium. Also called “lost crop” of Africa that in fact is of immense value today! Thrives in hot and fairly dry conditions. Requires 6 months of warm to hot growing conditions to yield mature tubers; in most of the nation, we recommend starting plants indoors in containers and setting outdoors after the weather has warmed in late spring.