Oca (Oxalis tuberosa) is a South American tuber crop that produces small, colorful potatoes in hardiness zones 6 through 9. This nitrogen-fixing plant grows to just 12 inches tall and flowers in November, making it a unique addition to cool-season gardens. The edible tubers develop underground while the plant's delicate foliage remains compact, offering gardeners a rare opportunity to grow an heirloom vegetable with genuine agricultural heritage and practical soil-building benefits.
Full Sun
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6-9
12in H x ?in W
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Low
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Oca's greatest strength lies in its dual purpose: while producing nutritious, starchy tubers similar to potatoes, it simultaneously improves soil health by fixing nitrogen. The plant remains low and manageable at 12 inches tall, fitting easily into containers or small garden spaces. Its flowering period in November adds a surprising ornamental quality to fall gardens, and the ability to thrive in zones 6 through 9 opens growing possibilities in regions where many tropical tuber crops fail.
Oca tubers are prepared much like potatoes, boiled, roasted, or steamed as a starchy side dish. In their native regions, they remain a traditional food staple, offering a creamy texture and mild flavor when cooked.
No timeline data available yet for this variety.
Harvest oca tubers after the plant flowers in November, once the foliage begins to decline. Dig carefully around the base of the plant to unearth the small tubers, similar to harvesting potatoes. The tubers are ready when they reach full size, which typically coincides with the plant's flowering period.
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