Croton foliage responds to light and changes in its surroundings. Keep roots aerated, avoid abrupt temperature shifts and inspect leaf loss before adjusting water.
Give color a useful setting
Croton, Codiaeum variegatum, is grown in many cultivars with different leaf shapes and markings. Keep the cultivar label when comparing plants. A young leaf may change color as it matures, so not every green patch represents a deficiency.
Avoid abrupt exposure changes
Provide bright light appropriate to the cultivar, introducing stronger sun gradually. A plant raised under shade can scorch against hot glass. Keep it away from cold drafts and avoid repeatedly moving it when leaves start dropping after a change.
Check moisture before reacting
Use a draining container and water the root ball evenly as it begins drying. Empty the outer pot after watering. Leaf drop can have several causes, including wet roots, so a watering increase should follow inspection rather than guesswork.
Keep new growth clean
Inspect leaf undersides and joints for pests if foliage becomes mottled or distorted. Feed moderately while growth is active. Use clean tools for pruning, avoid sap contact and judge improvement by healthy fresh leaves rather than expecting damaged ones to recover.
Related reading
Cordyline Forms: Leaf Color and Plant Size