At a glance
- Light
- Bright light, some sun
- Typical interval
- Every 6 to 8 days (summer)
Every 11 to 17 days (winter) - Climate
- 18–27 °C
- Humidity
- 40–60 %
- Pet safety
- Toxic to cats and dogs
- Scientific name
- Tradescantia pallida
When and how much water
Water purple heart when the top 3 cm of soil feel dry to the touch. In summer that’s typically every 6 to 8 days. In winter, slow down to every 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.
Light and placement
Purple heart needs bright light and a little gentle direct sun, such as morning sun. Strong midday sun can scorch the leaves. Place it close to an east- or west-facing window.
Feeding
Feed purple heart every 45 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
Purple heart is comfortable between 18 and 27 °C. Below 10 °C the leaves start taking damage, so keep it clear of cold drafts and unheated rooms.
It does best at 40–60% humidity. It doesn’t need misting.
Common problems
Yellowing, drooping, and dry edges often point to watering or drainage. Compare the signs before changing the routine.
Find what’s wrong
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.
Full Purple heart toxicity guide →
Pet-safe alternatives with similar light
Common questions
How often should I water a Purple heart?
Water your purple heart (Tradescantia pallida) when the top 3 cm of soil feel dry to the touch. 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 heart need?
Purple heart needs bright light and a little gentle direct sun, such as morning sun. Strong midday sun can scorch the leaves. Place it close to an east- or west-facing window.
Is Purple heart safe for cats and dogs?
The plant contains calcium oxalate (mild irritant). Chewing it can cause oral irritation, drooling, and vomiting. Keep purple heart out of reach of pets, or pick a non-toxic alternative like Norfolk Island pine, rosemary, pink jasmine, or Camellia.
Why are my Purple heart’s leaves turning yellow or drooping?
On a purple heart, yellowing and soft growth usually mean overwatering: watch for yellowing leaves, mushy stems, or root rot. Let the soil dry further between waterings and check drainage. If you see drooping leaves, crispy leaf edges, or fading purple color instead, it’s likely thirsty. Water a little more often. With Botanicaly Pro, Botanicaly Bot can help assess visible signs from a photo and suggest possible causes.
Sources4 references
- Royal Botanic Gardens, Kew: Plants of the World OnlineTaxonomy · accepted name · classification
- North Carolina State University Extension Gardener Plant ToolboxFull sun/partial shade · purple color response · drought and dry-soil tolerance · 50°F minimum · indoor container use · pests and pet/human irritation
- University of Wisconsin–Madison ExtensionFull sun for color · drought tolerance · monthly active-growth feed · winter water reduction · pests · fragile stems · dog/skin irritation note
- Royal Horticultural SocietyFull sun/partial shade · moist well-drained soil · movable containers · bright filtered houseplant light · winter watering · pests · skin allergen
Last reviewed: 2026-09-21
