Finger Oxalis

full sun (6 or more hours of sun hitting the leaves per day. South-facing window, no obstructions. Under grow lights, keep them 4-8 inches away for 12-14 hours) to bright indirect light (3-6 feet from a south or west window, or right next to an east window. Under a grow light, 6-10 inches away works well). As a South African fynbos plant, it is adapted to bright conditions and flowers best with plenty of direct sunlight. A south- or west-facing window works well indoors.

Average indoor humidity (25-49%) is sufficient. This is a plant from South Africa's semi-arid fynbos and does not need high humidity (60-80%. Group your plants together, set them on a pebble tray with water, or run a humidifier nearby). No misting (note: misting does not actually raise humidity meaningfully. A pebble tray or humidifier is more effective) required.

Well-draining potting mix for flowering plants works well. Gritty, loamy soil (equal parts potting soil, compost, and perlite) with good drainage is ideal -- reflecting its fynbos origins where soils are typically sandy and nutrient-poor. Avoid heavy, moisture-retaining mixes.

Corm rot from overwatering or poorly drained soil is the main issue. Aphids, spider mites, and mealybugs can appear during active growth -- treat with insecticidal soap. The plant may be mistaken for dead when dormant; do not discard it before checking whether corms are still firm. In mild climates, it can spread rapidly and become weedy if not contained.