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Oxalis

Common name: Oxalis · Wood sorrel · Shamrock plant

Oxalis is a large genus of mostly small, clover-like plants found on every continent except Antarctica. Many species fold their leaflets down at night or in strong light, a movement called nyctinasty. Bulb-forming species like Oxalis triangularis are popular houseplants for their shamrock-shaped leaves.

Care summary

Sun Bright indirect light
Water Keep lightly moist during growth
Soil Loose, well-draining potting mix
Hardiness Zones 7–10 (varies by species)
Mature height Usually 10–30 cm (4–12 in)
Pet safe Toxic if ingested (oxalic acid)

Fun facts

  • Leaves fold closed at night like tiny umbrellas.
  • The leaves are edible in small amounts and taste lemony from oxalic acid.
  • Many species grow from small bulbs and can go dormant, then regrow.

Common problems

    • Let soil surface dry between waterings
    • Use gritty free-draining potting mix
    • Empty saucers after watering
    • Rinse leaves under running water
    • Raise humidity around the plant
    • Pick off spotted leaves promptly
    • Improve airflow around plants
    • Avoid wetting the foliage