Rattlesnake plant care guide
Calathea lancifolia
Quick answer
Water your rattlesnake plant 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 8 to 12 days · winter - LightBright, indirect light
- Climate18–27 °C (64–81 °F)
- Pet safetyPet-safe (non-toxic)
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 8 to 12 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
Rattlesnake plant thrives in bright, indirect light. Direct midday sun can scorch the leaves. Place it on a north- or east-facing windowsill from spring to autumn, and on a sunnier south-facing one in winter.
Feeding
Feed your rattlesnake plant 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 16 °C (61 °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. Raise the humidity with a tray of damp gravel or a humidifier, or keep it in a bathroom or kitchen. Misting is not needed.
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?
No. Pet-safe.
Rattlesnake plant is non-toxic to cats and dogs. Safe to keep in a home with pets.
Pet-safety information in the JungleBook uses ASPCA reference data where available. It is reference information, not veterinary advice.
Common questions
How often should I water a rattlesnake plant?
Water your rattlesnake plant (Calathea lancifolia) 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 8 to 12 days.
How much light does a rattlesnake plant need?
Rattlesnake plant thrives in bright, indirect light. Direct midday sun can scorch the leaves. Place it on a north- or east-facing windowsill from spring to autumn, and on a sunnier south-facing one in winter.
Is rattlesnake plant safe for cats and dogs?
Rattlesnake plant is non-toxic to cats and dogs. Safe to keep in a home with pets.
Why is my rattlesnake plant 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 OnlineAccepted name · synonym and taxonomy context
- North Carolina State University Extension Gardener Plant ToolboxIndoor houseplant context · uniformly moist medium · peaty mix · limited sun · 65–75°F · high humidity · winter reduction
- Royal Horticultural SocietyPartial shade · moist well-drained soil · H1A · bright indirect/filtered light · humidity · 16°C (61 °F) minimum · feeding · pests
- ASPCA Animal Poison ControlScientific name · non-toxicity to dogs, cats and horses
- How we check our plant advice
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