Brown leaves/brown spots: sunburn, water stress or cold?
Brown leaves are often caused by water stress, sunburn, or cold/drafts. A quick check will help you identify the cause and take immediate action.
Brown leaves or brown spots: this is the cause (and how to solve it)
Brown leaves can have three completely different causes: too dry , too wet/root stress or sun/cold damage . With the quick check below, you'll know in just a few minutes which one is most likely — and what you need to do today.
Quick diagnosis (2 minutes)
- Feel 3–5 cm deep into the potting soil. Bone dry? → more likely to dry out. Wet/cold? → more likely to be too wet/root stress.
- How does the brown part feel? Crispy/dry = often sun/dry. Soft/dark = often too wet/cold.
- Where is the damage? On the window side = sun/cold window. Spread throughout = often water stress.
- Has it changed recently? (moved, season, new plant) → location stress.
Cause 1: Too dry (thirsty or dry for too long)
Identification: Brown, crispy edges or very dry leaves. Potting soil is light and dry.
What you do:
- Water well once and let it drain completely.
- Only water again when the top 2–3 cm is dry (not “little bits”).
- Is the plant next to a heater? Move it a little further away.
Cause 2: Too wet / root stress
Identification: Brown spots may be dark and somewhat soft, often accompanied by yellow leaves. Potting soil may remain wet for a long time or smell musty.
What you do:
- Stop watering and let everything drain well.
- Do not leave water standing in the decorative pot or saucer.
- Place in a slightly brighter spot (not in bright midday sun) so the pot can dry faster.
- If there is a musty smell or the plant remains wet: consider root stress/root rot and possibly repot it.
Cause 3: Sunburn (bright sun) or cold window (cold damage)
Recognize sunburn: pale/brown spots on the window side, often after a sunny day. The leaves may feel papery.
Cold weather: damage after a cold night/draft or against a cold window. Dark brown spots, sometimes a bit watery at first.
What you do:
- Place the plant in bright, indirect light (not bright midday sun).
- Move the plant away from a cold window/door or drafty spot.
- Damaged leaves won't heal; focus on preventing new damage.
What you do today (summary)
- Potting soil check: dry vs. wet determines your first action.
- Location check: sun, radiator, draft, cold window.
- Stability: do not move it constantly, do not add more water “just to be sure”.
Frequently asked mini questions
-
Should I cut off brown leaves?
For a neat appearance, trim away only the brown, dead parts. Leave healthy green leaves for recovery. -
Will brown spots turn green again?
No. Recovery is indicated by new leaves that remain healthy. -
When is it “worrying”?
If brown spots spread quickly and the potting soil remains stale/wet: check for root stress/root rot.
Read more: Light & location · Too much water vs. too little water Repotting & choosing a pot size
Related
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