Oxalis gigantea Barnéoud
Churqui and Churco (Spanish), Giant Oxalis
Oxalis gigantea, also known as Oxalis virgosa, is a shrubby succulent species, probably the largest known in the genus. It grows up to 8 feet (2.4 m) tall. Stems are slender, few branched, erect to curved and drooping, and up to 2 inches (5 cm) in diameter. They have numerous short spur-like shoots, fleshy at first, becoming woody with age. The small leaves are bright green, heart-shaped, and up to 0.4 inches (1 cm) long.
Flowers are bright yellow, up to 1 inch (2.5 cm) across, and appear in spring.
Oxalis gigantea is native to Chile. It grows in the xeric shrublands around Antofagasta, Atacama, and Coquimbo.
USDA hardiness zones 9b to 11b: from 25 °F (−3.9 °C) to 50 °F (+10 °C).
How to Grow and Care
These plants need bright indirect light to grow well and produce flowers. They can often bloom all winter if kept in a sunny spot. Keep the soil barely moist but never soggy. Allow the top 2 inches (5 cm) of soil to dry before watering. It is best to water your Oxalis from the bottom so that the thin, fragile stems of the plant don't get waterlogged and the soil stays loose. Oxalis plants grow best in cool temperatures between 60 to 70 ºF (15 to 21 ºC) during the day and 55 to 65 ºF (13 to 18 ºC) at night. The soil should be loose and sandy rather than rich and organic. Feed your plant monthly when actively growing with a basic houseplant food at 1/2 the recommended strength. Never feed an Oxalis when it is dormant, and the bulbs are resting.
To propagate Oxalis, simply split the plant into smaller plants and place them in their own pots. Keep it out of direct sunlight until new shoots appear.
See more at: How to Grow and Care for Oxalis.
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