Monstera: whole leaves turning brown
Whole browning leaves on a monstera usually indicate a root problem that has been developing for weeks. Check the roots rather than adjusting the watering can.
Working through the causes
Start with the first one — on monstera specifically, that's the most likely explanation. Each entry below names the observable that separates it from the others.
Root rot from overwatering most common
How to tell: Browning progresses from the lowest leaves upward, often yellowing first, while the soil stays damp. Stems may be soft at the base.
What to do: Let the soil dry well down and inspect the roots. Trim away anything soft or brown and repot into fresh, faster-draining mix.
Severe drought common
How to tell: Leaves go crisp and papery rather than soft, the pot is very light, and the soil has pulled away from the sides.
What to do: Bottom-water for 20–30 minutes so the rootball rehydrates evenly, then return to a consistent schedule.
Sun scorch seasonal
How to tell: Browning confined to the leaves facing the window, often bleached or tan, appearing within days of a move into brighter light.
What to do: Move it back from the glass or filter the light. Scorched tissue does not recover — judge the fix on new growth.
Natural aging harmless
How to tell: A single oldest, lowest leaf, while new growth continues above.
What to do: Remove it once fully brown. Nothing else to do.
Plantroster keeps every photo and every diagnosis for a plant, so "sun-scorched" becoming "sun-scorched and mite-infested" three days later is visible instead of lost.
Track this plantQuestions people ask
Should I cut off the affected leaves?
Damaged tissue never turns green again, so removing it is cosmetic — do it if it bothers you, using clean scissors. What matters is whether NEW growth comes in clean. That's your read on whether the fix worked, not the old leaves.
How long until I know it's working?
Give it two to three weeks. Existing damage won't reverse, so you're watching the newest leaves. If those still come in affected after three weeks, the cause you treated wasn't the cause.
More on monstera
General horticultural guidance based on visible symptoms. A photo or a description can't rule everything out — when a plant matters to you, check the roots before acting.