Aglaonema 'Siam Aurora' (Red Chinese Evergreen) problems — and how to fix them

Usually caused by low humidity, underwatering, or fertiliser/salt buildup. Raise humidity, keep watering consistent, and flush the soil; sensitivity to fluoride and chlorine in tap water can also brown tips, so use filtered or left-out water.

Most often overwatering and soggy soil leading to early root rot. Let the top 1-2 inches dry between waterings, ensure drainage holes, and check roots are firm and white, not mushy.

Too little light dulls the pink-and-red colour and can revert leaves toward plain green. Move to brighter indirect light (but not direct sun) to restore the markings.

Temperatures below 13-15C (55-59F) and cold drafts cause wilting, curling and dark patches. Keep it away from windows, doors and AC vents in winter and maintain 18-27C.

Mealybugs, aphids, scale and spider mites are the common pests, often appearing in leaf joints and undersides. Wipe leaves, isolate the plant, and treat with insecticidal soap or neem oil.

Caused by overwatering or poor drainage. Repot into fresh well-draining mix, trim any blackened roots, and water only once the top of the soil has dried.