Oxalis tuberosa

How to Grow Oxalis tuberosa

Overview

Oxalis tuberosa, also known as oca or New Zealand yams, is a fascinating perennial herbaceous plant that overwinters as underground stem tubers. This unique vegetable was brought into cultivation in the central and southern Andes for its delicious tubers, which have been used as root vegetables for centuries.

Growing Conditions

Oxalis tuberosa thrives in well-drained, fertile soil with a pH between 6 and 7. They prefer temperatures between 45°F and 75°F (7°C to 24°C) and are best suited for climates with cool, moist summers and mild winters. These plants require full sun to partial shade, depending on your location.

Planting & Care

Plant oca tubers in early spring, about 6 inches apart and 4 inches deep, in a sunny location. Keep the soil consistently moist but not waterlogged, as they are susceptible to root rot. Mulch around the plants to conserve moisture and control weeds. Fertilize lightly with compost or well-rotted manure to encourage healthy growth.

Common Problems

Oxalis tuberosa is generally easy to grow, but they can be prone to fungal diseases if their roots stay too wet for extended periods. Watch out for signs of moldy leaves, as this could indicate a deeper issue with the soil moisture levels. If you notice any rot or decay in your oca tubers, remove them from the planting area immediately to prevent the spread of disease.

Harvest or Enjoy

Oca tubers are ready to harvest 3-4 months after planting, typically in late summer or early fall. Carefully dig up the plants and check for healthy, firm tubers that feel heavy for their size. Avoid any tubers with soft spots, decay, or obvious damage. Wash your harvested oca and store them in a cool, dry place for up to 6 months.

Enjoy experimenting with this unique and versatile vegetable in your kitchen - they can be boiled, mashed, baked, or roasted, making them a