Why Are My Houseplant Leaves Turning Brown?
Brown leaves and brown leaf tips are common houseplant problems. They can be caused by underwatering, dry air, excessive sunlight, root problems, feeding issues or simply natural ageing.
The key is to look at where the browning occurs and what the compost and rest of the plant are telling you.
Brown, crispy edges and tips
If leaf edges are brown and crispy, check whether the plant is getting too dry. Underwatering can cause brown edges, wilting and leaf drop.
Dry indoor air can also contribute, particularly during winter when central heating is running. Tropical houseplants may be more sensitive to low humidity.
Brown patches from sunlight
Strong direct sunlight can scorch foliage. Brown or bleached patches are particularly likely when a plant that prefers indirect light is placed in intense sunshine.
Move the plant to a position appropriate for its variety rather than assuming that every houseplant wants a sunny windowsill.
Too much water can also cause brown leaves
Overwatering can damage roots, which then affects the plant's ability to take up water and nutrients. A plant with damaged roots may wilt even though the compost is wet.
Check for drainage problems and make sure excess water can escape.
Cold draughts and heat
Houseplants can be stressed by cold draughts, sudden temperature changes and direct heat from radiators. Look at the plant's position if browning appeared soon after a move or change in weather.
Natural ageing
An occasional old leaf turning brown is normal. If the plant is producing healthy new growth and only older leaves are affected, there may be no serious problem.
What about brown tips?
Brown tips can have several causes, including dry conditions, low humidity, root stress and unsuitable watering. Trim only the damaged portion if you want to improve the plant's appearance, but first address the underlying cause.
A simple brown-leaf checklist
• Is the compost dry or wet?
• Does the pot drain freely?
• Is the plant receiving strong direct sun?
• Is it next to a radiator?
• Is it exposed to a cold draught?
• Are new leaves healthy?
• Are there pests?
• Has the plant recently been repotted?
How to prevent brown leaves
Match the plant to the room, provide suitable light, water according to its needs and use a pot with drainage. Avoid dramatic changes in conditions and inspect leaves regularly for pests.
Thompson's Garden Centre can help you choose houseplants based on your home's light levels and your preferred level of care. Brown leaves are a clue, not a diagnosis. Check moisture, light, humidity, temperature and roots before changing your routine. Once you identify the cause, many houseplants can recover and produce healthy new growth.
Related Thompson's guides
• Houseplant Care
• Houseplants for Low Light
• Houseplants for Direct Sun
• Houseplants for Beginners