Plant Problem Diagnostic
Why Is My Shrub Turning Brown or Dying? A Diagnostic Checklist
The short answer
First find out whether it's actually dead. Wait until mid-spring and watch for buds to swell, or scratch a small spot of bark on several twigs and the main stems: green and moist underneath means that part is still alive, brown and dry means it's dead. Already-brown foliage on an evergreen won't turn green again, but if the buds are alive the plant can refoliate.
Then work through the usual causes in order: winter burn on evergreens (brown foliage on the sunny/windy side after winter), too much or too little water (both look similar — wilting and browning), a shrub planted too deep with its root flare buried, and recent transplanting. Match the pattern to the cause below rather than guessing.
Is it dead, or can it recover?
Don't condemn a shrub off one brown branch. Check several twigs and a main stem; a plant can lose a branch or two and be fine. On evergreens, buds are hardier than the foliage, so a shrub that browned over winter often pushes new growth in spring — wait until mid-spring to prune out what stays dead.
Common causes, and how to tell them apart
- 1Winter burn (evergreens) — Brown, dried needles/leaves, worst on the side facing sun and wind, showing up in late winter/early spring. Caused by foliage losing water while roots are in frozen soil. Yew, arborvitae, and hemlock are especially prone.
- 2Too little water — Wilting, browning leaf edges (leaf scorch), and dieback, especially on recent plantings and in droughty spells. Check soil 6 inches down before watering.
- 3Too much water / poor drainage — Similar wilting and yellowing, but soil stays soggy. Roots suffocate in waterlogged soil — many new shrubs are killed by watering too often, not too little.
- 4Planted too deep — Stunted, sparse growth, yellowing, tip dieback, and no visible root flare where the trunk widens at the base. Burying the flare (often under a 'mulch volcano') slowly declines the plant.
- 5Transplant stress — Recently moved or newly planted shrub with wilting, scorch, and slow growth — see the transplant-shock guide; give it time and even moisture, and don't fertilize.
→ If none of these fit and the browning is spreading with spots, lesions, or dieback on specific branches, it may be a disease or borer problem — send a sample or photos to your local Extension diagnostic service.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- University of Minnesota Extension — Winter damage on evergreen trees and shrubs — Winter sun and wind cause evergreen foliage to lose water while roots are in frozen soil, browning yew/arborvitae/hemlock most; brown foliage is dead and won't green up, but hardier buds may refoliate, so wait until mid-spring to prune.
- University of Maryland Extension — Trees Planted Too Deeply — A buried root flare signals a plant set too deep, which causes stunted/sparse growth, yellowing, leaf scorch, and branch dieback.
- University of Maryland Extension — Watering Trees and Shrubs — Both underwatering and overwatering damage shrubs; many newly planted trees are drowned by watering too often, so check soil moisture 6 inches down before watering.
- Purdue University Extension — Transplant Shock of Trees and Shrubs (BP-31) — Recently transplanted trees and shrubs show wilting, leaf scorch, yellowing, and reduced growth as transplant shock, often from root loss or improper watering.