Oxalis tuberosa
Oca
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Oca (Oxalis tuberosa) - Description
Oxalis tuberosa (Oxalidaceae) is a perennial herbaceous plant that overwinters as underground stem tubers. These tubers are known as oca, from the Quechua words okka, oqa, and uqa; New Zealand yam; and a number of other alternative names. The plant was brought into cultivation in the central and southern Andes for its tubers, which are used as a root vegetable.
Oca (Oxalis tuberosa) - Blooming
Flowers come in pink, white, rose or yellow. They are 5-petaled, bowl-shaped. Flowers will open only in sunlight. Close at night or in gloomy weather conditions.
Oca (Oxalis tuberosa) - Growth
Fibrous-rooted, bulbous, rhizomatous, or tuberous annuals and perennials. Some species can reach 1 ft. in height, but most species of Oxalis are low to the ground. Most species do well as shade plants in the under stories of trees. Members of the Oxalis genus spread via underground rhizomes and some can be extremely invasive.In less hardy areas, grow Oxalis in a temperate or warm greenhouse.Species from Southern Africa and South America make nice additions to a rock garden, raised bed, trough, or alpine house.
Oca (Oxalis tuberosa) - Planting
Propagate from the seed in late winter or early spring at 55-64°F (13-18°C). Conduct division in spring. Rhizomatous species root readily.
Oca (Oxalis tuberosa) - Pest
Leaf miners and spider mites. Also prone to rust, powdery mildew, fungal leaf spots, and seed smut.
Oca (Oxalis tuberosa) - Interesting facts
Most species of Oxalis are from South America and southern Africa.
Oca (Oxalis tuberosa) - Soil and irrigation
Container grown plants should be kept just moist when dormant. Water moderately during the growing season. Does best in moist, rich soils. Most prefer soils with good drainage.
