Angel Wing Begonia 'Lucerna' problems — and how to fix them

White powdery coating on leaves, encouraged by stagnant, humid air and wet foliage. Improve air circulation, avoid misting, remove affected leaves, and treat with an appropriate fungicide if it spreads.

Soggy mix leads to yellowing leaves, mushy stem bases, and collapse. Let the top few centimetres dry between waterings, use a free-draining mix, and never leave the pot in standing water.

Sparse, stretched canes and poor blooming usually mean too little light. Move to a brighter spot with indirect light and pinch the growing tips to promote bushier, more floriferous growth.

Bleached or browned patches and faded leaf spots come from direct, harsh sun. Filter the light or move the plant back from hot, sunny windows.

Aphids, whiteflies, and mealybugs can infest new growth and leaf undersides. Inspect regularly and treat with insecticidal soap or neem oil, repeating as needed.

Not cold-hardy: temperatures below about 13C, cold draughts, or sudden chills cause leaf drop and damage. Keep it warm and away from cold windows and doorways.