Answer: Jicama (Pachyrhizus erosus) will grow in all zones of California. The plant is grown for its edible root, which looks like a brown turnip and tastes something like a water chestnut. Give full sunshine and don't allow the soil to dry out during the growing season. Jicama puts out twining or scrambling vines and will need to be staked. Sow seeds 1 to 1 1/2 inches deep, 6 to 12 inches apart. Feed once or twice in early and mid-summer. The roots or tubers will form as the days begin to grow shorter in the autumn. Harvest before the first frost.
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