Overwatering or underwatering can color plant leaves brown. To ensure plant watering, check soil moisture regularly. Most plants need water when the top inch of soil feels dry, although species vary.
Plant containers and garden beds should drain effectively. Poor drainage causes waterlogged soil, fungal growth, and root rot, which browns leaves.
Air circulation prevents leaf dark patch fungi. Spacing plants allows ventilation. Overcrowded indoor plants are bad.
Regularly remove dead or diseased leaves to prevent plant infections. Use sharp, clean pruning shears to avoid infections. Clean pruning tools between plants to avoid contamination.
Water plants from the base to avoid leaf wetting. Wet leaves and dampness breed fungi. Overhead irrigation in the morning enables leaves dry quickly under the sun.