Skip to main content

Leaf Scorch

Plant disorder

Description​

Leaf scorch is a description of leaf damage, not a single disease with a scientific name. It develops when leaves lose water faster than the roots can replace it. Hot sun, dry soil, low humidity, and drying winds are common triggers. Damaged roots, waterlogged soil, compacted ground, and excess fertilizer or salts can cause similar symptoms by limiting water uptake. Leaf edges or areas between veins turn dry and brown, often with a yellow border between healthy and damaged tissue. Exposed leaves may be affected first, though severe stress can spread across the plant. Leaves may wilt or fall early. The browned tissue is dead and will not turn green again, but the plant can produce healthy new growth once the cause is corrected. Leaf scorch can affect many kinds of plants, especially during hot, dry weather or soon after transplanting.

Symptoms​

  • Brown or crispy leaf edges
  • Bleached or scorched patches
  • Yellowing leaves
  • Wilting
  • Leaves dropping

How to Identify​

Look for dry, papery browning at leaf tips, margins, or between veins, particularly after heat, wind, drought, or transplanting. Check soil moisture and drainage: both very dry and persistently wet soil can leave roots unable to supply enough water. Scorch usually lacks the distinct spots, fuzzy growth, or visible insects associated with many pests and diseases. A sunburned leaf may instead show a sharply defined pale patch on its most exposed surface. If marginal browning repeatedly progresses through the plant despite suitable care, consider bacterial leaf scorch or another vascular problem; a local diagnostic laboratory can test for it.

Prevention​

Keep soil evenly moist according to the plant’s needs, watering deeply enough to reach the root zone rather than giving frequent shallow sprinkles. Check moisture before watering, especially in containers, and make sure excess water can drain. Add a layer of organic mulch over the soil, leaving space around stems, to reduce evaporation and moderate soil temperature. Give plants an appropriate amount of sun and shelter from drying wind; gradually acclimate plants moved outdoors or into stronger light. Avoid excess fertilizer, which can raise soil salt levels. Protect roots from compaction and digging damage, and choose plants suited to the site. Water newly planted specimens carefully while their roots establish.

Treatment​

First, check the soil and correct the cause rather than treating the brown leaves. If the root zone is dry, water slowly and deeply, then monitor it so it stays appropriately moist without becoming soggy. If soil remains wet, reduce watering and improve drainage where practical. Give a container plant temporary afternoon shade or move it out of drying wind, making changes gradually. Mulch bare soil to conserve moisture, keeping mulch away from stems. If excess fertilizer or salts are suspected, stop feeding; thoroughly flush a container only if it drains freely. Do not fertilize a stressed plant to force new growth. Once conditions improve, remove fully dead leaves if desired, but retain leaves with substantial green tissue. Scorched areas cannot heal, so judge recovery by new growth. If damage continues despite corrected care, seek a local diagnosis before using any pesticide; ordinary environmental leaf scorch does not need one.

Plants Affected​

American Sycamore, Aucuba, Bottlebrush Buckeye, Buxus, Dogwood, Flowering Dogwood, Ginkgo, Ginkgo Biloba, Horse Chestnut, Japanese Maple, Kalmia, Kousa Dogwood, Maple, Oleander, Pacific Dogwood, Pin Oak, Red Maple, Red Oak, Rhododendron, River Birch, Sequoia, Skimmia, Sugar Maple, Sycamore, Tulip Poplar, Tulip Tree, Yellow Poplar

Not sure this is your problem? Try the problem diagnoser.