Sunburn / Leaf Scorch: Causes, Diagnosis & Fixes
Sunburn occurs when a plant receives more direct light than it can handle, causing bleached or scorched patches on leaves.
Quick diagnosis
Sunburn damage is permanent on affected leaves but the plant will recover once light is adjusted. Always acclimate gradually to brighter conditions.
考えられる原因
Sudden Exposure to Direct Sun
Why: Plants accustomed to indirect light can burn when suddenly moved into direct sunlight.
Signs to check: White or bleached patches on sun-facing leaves, damage appears within days of moving.
Intense Afternoon Sun
Why: Afternoon sun is much stronger than morning sun and can scorch even sun-tolerant plants.
Signs to check: Brown, crispy patches on the side facing the window, often west-facing exposure.
Magnification Through Glass
Why: Water droplets or certain window glass types can focus light and intensify burning.
Signs to check: Circular burn marks on leaves, damage on leaves closest to the window.
確認ポイント
- 1Note where the damage appears on the plant relative to the light source
- 2Check if the plant was recently moved to a brighter spot
- 3Identify the direction the window faces and time of sun exposure
- 4Look for water droplets on leaves that could magnify light
対処法
- Move the plant away from direct sunlight or add a sheer curtain
- Gradually acclimate plants to brighter conditions over 1-2 weeks
- Remove severely scorched leaves to redirect energy
- Avoid misting leaves in direct sunlight
- Water at the base rather than overhead during sunny periods
専門家に相談するタイミング
- Large portions of the plant are bleached or crispy
- Plant is losing most of its leaves from scorch damage
ポイント
Sunburn damage is permanent on affected leaves but the plant will recover once light is adjusted. Always acclimate gradually to brighter conditions.
Frequently asked questions
What causes sunburn / leaf scorch in houseplants?
Sunburn occurs when a plant receives more direct light than it can handle, causing bleached or scorched patches on leaves. Common causes include sudden exposure to direct sun, intense afternoon sun, magnification through glass.
How do I fix sunburn / leaf scorch?
Start by identifying the likely cause instead of applying every remedy at once. Move the plant away from direct sunlight or add a sheer curtain Gradually acclimate plants to brighter conditions over 1-2 weeks Remove severely scorched leaves to redirect energy
Track the problem over time
アプリで回復を追跡
進捗を記録し、リマインダーを設定し、AI による診断を受けましょう。
Sources and review
Content last reviewed: September 4, 2026
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