Also known as Oca, New Zealand Yam (Oxalis tuberosa) are an interesting root vegetable that has their origins in South America.
This compact bushy perennial plant has clover like foliage that will wilt in temperatures over 28 degrees,so this plant is best suited to areas with cooler Summers or partly shaded spots in the garden.
The knobbly tubers look like wrinkly carrots, and can be used much the same as potatoes are used, (boiled, baked or fried), but unlike potatoes, Oca can be eaten raw in many different ways. The foliage is also edible and can be used in salads and the like.
Ideally planted in Spring, after the risk of frost is over, tubers need to be planted about 5 cm under the soil. Soil can be hilled around plants as they are growing to encourage a larger yield. Once tubers are ready for harvest, foliage will begin to die back. Tubers can be stored at room temperature for several months after harvest.
