Monstera Leaves Turning Brown: Causes plus Fixes
Monstera leaves turning brown usually trace back to the room, not a pest. University of Wisconsin Extension notes leaf edges turn brown when humidity is too low. University of Missouri notes brown tips often come from fertilizer buildup or improper watering. Sudden sun can scorch leaves too. The pattern of browning points to the cause.
The short answer
Brown edges often mean dry air. Brown tips can mean salt buildup or uneven watering. Pale scorched patches after a move outdoors mean sunburn. Water thoroughly, then let the top quarter to third of the mix dry. Raise humidity, flush built up salts plus avoid sudden direct sun.
What does dry air do to monstera leaves?
University of Wisconsin Extension notes monstera prefers medium to high humidity. It notes leaf edges turn brown if humidity is too low. North Carolina State Extension notes the plant likes high humidity. It suggests a tray of wet pebbles under the pot to raise humidity in dry rooms. Heated winter rooms often run dry.
| Brown pattern | Likely cause | Fix | Source |
|---|---|---|---|
| Brown leaf edges | Low humidity | Wet pebble tray | University of Wisconsin plus NC State |
| Brown tips plus margins | Fertilizer salts or uneven watering | Flush with clear water | University of Missouri |
| Scorched patches after moving out | Sunburn | Ease into brighter light | University of Wisconsin |
| Wet, sweating leaves | Mix too moist | Water less | University of Wisconsin |
Source: University of Wisconsin Extension, North Carolina State Extension plus University of Missouri.
How does watering cause brown tips?
University of Missouri notes tipburn most often comes from excess fertilizer, improper watering or fluoride. As a mix dries, it loses water but not fertilizer salts. That raises root zone salinity. A whitish crust on the mix means it should be flushed with clear water. It advises never using water from a water softener.
Can too much sun brown monstera leaves?
University of Wisconsin Extension notes monstera does well in bright light in summer plus direct sun in winter. Plants moved outside need gradual exposure to higher light, or the leaves suffer sunburn. North Carolina State Extension notes moderate brightness without direct sun suits it. Illinois Extension notes indoor light is far weaker than outdoors.
How to: step by step
- Note where the brown begins: edges, tips or patches.
- Soak the pot fully, then wait until the top quarter to third of the mix is dry.
- Rest the pot on a tray of wet pebbles in dry rooms.
- Flush the mix with clear water if a white crust forms.
- Skip fertilizer in winter when the plant gets no extra light.
- Shift plants into brighter light slowly.
Troubleshooting
Crisp brown edges: low humidity. Add a wet pebble tray.
Brown tips with white crust on the mix: salt buildup. Flush with clear water.
Leaves sweating plus mix soggy: overwatering. Water less to avoid root rot.
For related reading see underwatering cannabis, overwatering and cannabis growth plus relative humidity control for cannabis. Kind Seed Co also stocks cannabis seeds.
Sources
- Monstera deliciosa, North Carolina State Extension
- Swiss cheese plant, Monstera deliciosa, University of Wisconsin Extension
- Houseplant lighting, Illinois Extension
- Leaf tipburn on houseplants, University of Missouri
FAQ
Why are my monstera leaf edges turning brown?
University of Wisconsin Extension notes monstera leaf edges turn brown when humidity is too low. The plant prefers medium to high humidity. North Carolina State Extension suggests setting the pot on a tray of wet pebbles to raise humidity in dry rooms, which helps most during heated winter months indoors.
Can overwatering turn monstera leaves brown?
Watering problems in either direction can. University of Missouri lists improper watering as a main cause of tipburn. University of Wisconsin Extension notes leaves sweat when the mix is too moist and advises watering less to avoid root rot. Water thoroughly, then let the top part of the mix dry.
Should I cut off brown monstera leaf tips?
University of Missouri notes that once a leaf tip dies, there is no way to return it to its normal look. Clipping off the dead part is one option. Fixing the cause matters more, since new leaves can develop the same symptoms as they mature if conditions stay the same.
Does tap water cause brown tips?
It can play a part. University of Missouri notes many public water sources contain trace amounts of fluoride, which some plants absorb over time. It advises never watering houseplants with water from a water softener. Flush the mix with clear water when a whitish crust shows on top of the pot.
How much light does a monstera need?
University of Wisconsin Extension notes monstera does well in bright light in summer plus direct sun in winter. North Carolina State Extension notes it prefers moderate brightness but not direct sunlight. Move plants into brighter light gradually, since sudden full sun can burn the leaves.
