Philodendron Tortum (Fernleaf) problems — and how to fix them

Usually overwatering or a mix that stays soggy. Let the top 3-5 cm dry between waterings, use a chunky free-draining aroid mix and a pot with drainage holes, and cut back water in winter.

Typically low humidity, or occasionally mineral buildup from hard tap water. Raise humidity toward 60% with a humidifier or pebble tray, and flush the soil or switch to filtered or rainwater.

A sign of insufficient light or lack of support. Move to brighter indirect light and add a moss pole so the vine can climb, which triggers larger, more deeply lobed mature foliage.

Common in dry indoor air. Look for fine webbing and pale stippling on leaves; rinse the foliage, raise humidity and treat with insecticidal soap or neem oil, repeating weekly until clear.

Can mean either underwatering (dry, light pot) or overwatering with rotting roots (soggy, sour-smelling soil). Check soil moisture before correcting, and keep temperatures above about 15C (59F).

Sensitive to cold drafts and sudden temperature drops. Keep away from doors, single-glazed windows and air-conditioning vents, and maintain temperatures in the 18-27C (65-80F) range.