Why Are My Plant's Leaves Turning Yellow or Brown?
The pattern tells you the cause — here's how to read it.
"Yellow leaves" and "brown leaves" aren't one problem — they're several different problems that all show up as discoloured foliage. The exact pattern (whole leaf vs tips vs spots, old growth vs new growth) narrows it down fast. Match what you're seeing below.
Match Your Pattern
Likely cause: Usually overwatering (most common) or natural aging of an old lower leaf.
Fix: Check soil moisture before your next watering; let it dry out more between waterings. If it's the only lower leaf, it's likely fine.
Likely cause: Low humidity, under-watering, or mineral buildup from tap water.
Fix: See our humidity guide, water more consistently, and consider filtered water for sensitive plants.
Likely cause: Fungal/bacterial leaf spot, sunburn, or water sitting on leaves too long.
Fix: Remove affected leaves, improve airflow, avoid wetting foliage when watering, and move out of direct sun if that's the trigger.
Likely cause: A pest infestation (spider mites, mealybugs, scale) is stressing the plant.
Fix: Inspect closely under leaves. See our pest identification guide to confirm which pest and how to treat it.
Want a diagnosis specific to your exact plant?
Our Plant Clinic has detailed problem guides for hundreds of species-specific symptoms.
Browse the Plant Clinic →FAQs
Why are my plant's leaves turning yellow?
Most often overwatering — soggy roots can't function, so the plant sheds leaves starting with the oldest/lowest ones, which yellow first. Other causes: natural leaf aging (one or two lower leaves yellowing is normal), nitrogen deficiency, or too little light.
Why do my leaves have brown, crispy tips?
Classic sign of low humidity or under-watering — the tips are furthest from the roots and dry out first. Also caused by tap-water mineral buildup (fluoride/salts) in sensitive plants like Calathea and Dracaena; try filtered or rain water.
Why do my leaves have brown spots in the middle, not just the edges?
Spots (as opposed to edge-browning) usually point to fungal or bacterial leaf spot disease, sunburn from direct sun on a shade plant, or watering that splashes onto leaves and doesn't dry (common with overhead watering).
Should I cut off yellow or brown leaves?
Yes — once a leaf is yellow or has significant brown damage, it won't turn green again. Trim it off at the base with clean scissors; this redirects the plant's energy to healthy growth and reduces disease risk.
Is one yellow leaf normal?
Usually yes. Plants naturally shed their oldest, lowest leaves over time as they focus energy on new growth. Worry when multiple leaves yellow at once, or when it's the newer top growth affected.
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Catch problems before they spread
Weekly diary photos make it easy to spot changes early — before a yellow leaf becomes five.
