Plant care guide
Croton Dropping Leaves: Moving, Light, Cold or Water?
Updated
Why is my Croton dropping leaves?
Crotons drop leaves when their conditions change suddenly: a move from a bright greenhouse to a dim room, a cold draft, temperatures below about 15 °C (55 °F), or mix that stays too wet or too dry. Leaf drop right after you bring a croton home is a reaction to the move.
What to do first
Put the croton in the brightest indirect light you have, out of drafts and away from heat vents, and keep it above 15 °C (55 °F). Water when the top 1–2.5 cm (½–1 in) of mix is dry, then leave it in one place while it adjusts.
A croton shedding its colorful leaves is upsetting, especially on a new plant. The cause is usually a change, not a disease. University of Wisconsin–Madison Extension says changing environments too quickly can shock the plants and cause leaf drop.
Crotons are tropical shrubs that like steady warmth, bright light and even moisture. Work out which of those changed, fix it, then keep the plant still while it settles.
Find the cause
A recent move
New crotons often drop leaves in their first weeks at home. Iowa State University Extension says leaf drop can occur when plants are moved quickly from bright to darker locations. It recommends changing light levels gradually, over several weeks.
Clemson Cooperative Extension says leaf drop after a significant change in environment should only last about three weeks. Drop that continues past that points to an ongoing problem.
Moving outdoors for summer and back in for winter causes the same reaction. Wisconsin advises acclimating gradually in both directions.
Not enough light
NC State Extension says crotons need bright light, with some direct sun, and may lose lower leaves in too much shade. The RHS says leaves may lose their color or drop in insufficient light. Wisconsin adds that leaves may revert to shades of green in insufficient light, so fading color is an early warning.
Too much sun through glass is the opposite problem. The RHS warns that full summer sun through a window can overheat and scorch leaves.
Cold and drafts
- The RHS gives a range of 18–35 °C (65–95 °F) and says not to let crotons drop below 15 °C (55 °F). It names cold draughts and fluctuating temperatures as causes of leaf drop.
- Wisconsin says crotons do best at 16–29 °C (60–85 °F) and often drop leaves if temperatures stay below 10 °C (50 °F).
- Iowa State warns that even brief exposure to freezing air during transport can damage tropical plants. Wrap the plant when carrying it home in cold weather.
Check for cold windows at night, an outside door, air conditioning, and heat vents that cycle on and off.
Watering
Wisconsin says crotons drop leaves if they are too wet or too dry for extended periods. The RHS lists dry compost and dry air as causes of leaf drop, and warns that waterlogged compost leads to root rot. UF/IFAS Extension notes that new croton foliage wilts when thirsty, which makes a useful watering signal.
Pests
NC State notes crotons are susceptible to spider mites. Check leaf undersides before blaming the environment. Our croton pests guide covers identification and treatment.
What to do
- Choose one bright spot and leave the plant there. Bright, indirect light suits indoor crotons, according to Wisconsin. Each move is another change it has to adjust to.
- Remove drafts and heat sources. Keep the plant away from doors, cold glass at night and heating or cooling vents.
- Keep it warm, above 15 °C (55 °F), as the RHS advises.
- Water by the mix, not the calendar. Wisconsin says to water when the top 1–2.5 cm (½–1 in) of mix is dry, and to water less in winter. The RHS advises tipping out any excess so the pot doesn’t stand in water.
- Raise humidity if the air is dry. The RHS and NC State suggest a tray of damp pebbles.
- Check the roots if the mix stays wet and leaves keep falling. Clemson describes rotted roots as brown to black and soft.
Recovery and prevention
Bare stems can regrow. Wisconsin says leggy plants can be pruned hard in early spring to stimulate branching and new growth. Cut above a leaf joint, as the RHS suggests, and wash your hands afterwards. NC State and Wisconsin warn the sap can irritate skin.
Bring outdoor crotons in before nights fall below 10 °C (50 °F), as NC State and Wisconsin advise. For light levels in more detail, see our croton light guide, and the croton hub for general care.
Related guides
Other croton problems we cover: overwatering, brown tips.
References
- University of Wisconsin–Madison Extension: Croton, Codiaeum variegatum
- RHS: How to grow codiaeum
- NC State Extension Gardener Plant Toolbox: Codiaeum variegatum
- Clemson Cooperative Extension: Houseplant Diseases & Disorders (HGIC 2251)
- Iowa State University Extension: Diagnosing Houseplant Problems from Improper Environmental Conditions
- UF/IFAS Gardening Solutions: Crotons
How this guide was put together: University of Wisconsin–Madison Extension, RHS, NC State Extension, Clemson Cooperative Extension, Iowa State University Extension and UF/IFAS Extension guidance.