Purple shamrock care guide
Oxalis triangularis
Quick answer
Water your purple shamrock when the top 3 cm (1.2 in) of soil feel dry. In summer that’s typically every 6 to 8 days.
- WateringEvery 6 to 8 days · summer
Every 11 to 17 days · winter - LightBright, indirect light
- Climate12–24 °C (54–75 °F)
- Pet safetyToxic to cats and dogs
Not sure it’s this plant?Get the free Botanicaly app and find out with a photoWhen and how to water
3 cm (1.2 in)
- Summer · Jun–AugEvery 6 to 8 days
- Winter · Dec–FebEvery 11 to 17 days
Use room-temperature water and let any excess drain. Never leave the pot sitting in standing water.
Adjust the timing for the light at the plant, the pot’s size and material, and the humidity indoors. Terracotta dries faster than glazed ceramic.
Work out your own rhythm with the watering calculator.
Light and placement
Bright, indirect light
Purple shamrock thrives in bright, indirect light. Direct midday sun can scorch the leaves. Place it 1–2 meters back from an east or west window, or behind a sheer curtain on a south window.
Feeding
Feed your purple shamrock every 30 days while it’s actively growing. Use a balanced liquid houseplant fertilizer at half the strength on the label, and only on soil that’s already damp. Feeding dry roots can scorch them.
When growth pauses, skip the fertilizer and let it rest.
Temperature & humidity
Climate12–24 °C (54–75 °F)
Humidity40–60%
During leafy growth, aim for 12–24 °C (54–75 °F). For routine indoor care, keep it above about 10 °C (50 °F) and avoid cold drafts. This is a care guideline, not an exact damage threshold. Cooler overwintering depends on the species and its rest conditions.
It does best at 40–60% humidity. It doesn’t need misting.
Toxic to pets?
Yes. Keep it out of reach.
Pet-safety information in the JungleBook uses ASPCA reference data where available. It is reference information, not veterinary advice.
Pet-safe alternatives with similar light
Common questions
How often should I water a purple shamrock?
Water your purple shamrock (Oxalis triangularis) when the top 3 cm (1.2 in) of soil feel dry. In summer, that’s typically every 6 to 8 days. In winter, slow down to every 11 to 17 days.
How much light does a purple shamrock need?
Purple shamrock thrives in bright, indirect light. Direct midday sun can scorch the leaves. Place it 1–2 meters back from an east or west window, or behind a sheer curtain on a south window.
Is purple shamrock safe for cats and dogs?
Toxic to cats and dogs if chewed. Keep purple shamrock out of reach of pets, or pick a non-toxic alternative like rabbit foot fern, staghorn fern, lemon button fern, or rose-painted calathea.
Sources
- This guide follows established plant-care guidance and official ASPCA pet-safety references. How we verify our plant data →
- How we check our plant advice
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