Dumb cane (dieffenbachia) care guide
Dieffenbachia seguine
Quick answer
Water your dumb cane when the top 3 cm (1.2 in) of soil feel dry to the touch. 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
- Climate18–27 °C (64–81 °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
Dumb cane 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 dumb cane 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
Climate18–27 °C (64–81 °F)
Humidity60–80%
During leafy growth, aim for 18–27 °C (64–81 °F). For routine indoor care, keep it above about 15 °C (59 °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 60–80% 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.
Wear gloves when you cut or repot it. Keep the sap away from your eyes and skin, and wash your hands afterwards.
Pet-safety information in the JungleBook uses ASPCA reference data where available. It is reference information, not veterinary advice.
Full dumb cane toxicity guide →
Pet-safe alternatives with similar light
Common questions
How often should I water a dumb cane?
Water your dumb cane (Dieffenbachia seguine) when the top 3 cm (1.2 in) 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 dumb cane need?
Dumb cane 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 dumb cane safe for cats and dogs?
The plant contains insoluble calcium oxalate crystals and proteolytic enzymes. Chewing it can cause oral irritation, drooling, and vomiting. Keep dumb cane out of reach of pets, or pick a non-toxic alternative like Boston fern, Kentia palm, money tree, or peacock plant.
Why is my dumb cane turning yellow or drooping?
Yellowing, drooping and brown tips can have several causes. Check the potting mix before adding water and follow this plant’s watering and rest instructions. If the mix is still wet, do not add more water. Check drainage and roots, then light, humidity, water quality and pests. Faded color or webbing alone does not show that the roots need water.
Sources4 references
- Royal Botanic Gardens, Kew: Plants of the World OnlineTaxonomy · accepted name · native range · biome
- Royal Horticultural SocietyPosition · soil · moisture · cultivation · humidity · feeding · pests · hardiness
- North Carolina State University Extension Gardener Plant ToolboxLight · soil · drainage · moisture · humidity · houseplant context · problems
- ASPCA Animal Poison ControlDieffenbachia genus pet-safety record · not species-exact for Dieffenbachia seguine
- How we check our plant advice
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