Woody plant stress has many potential causes that can ultimately lead to decline and death of landscape trees and shrubs. This publication discusses the symptoms and comm...
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Once autumn leaves have fallen, mistletoe becomes highly visible on large trees throughout Kentucky. Phoradendron, the scientific name for Kentucky’s most common type of this parasitic plant, means ...
Stress and Decline in Woody Plants (ID-50)
DEC 11, 2025
Fixing deep planting and buried root flares
SEP 13, 2025
In the forest, tree root flares are near the surface.
Roots radiate out from the trunk like spokes on a wagon wheel. Roots grow in soils with active biology, including benefici...
August Arbor Doctor Client Update
AUG 18, 2025
Happy August!
It's dry out there, at least in some areas.
Rainfall has been highly variable this summer. Most areas saw very wet conditions in July, but the spigot has shut off for some in August. W...
On the morning of July 26, 2025, Arbor Doctor Principal Owner Ron Rothhaas joined radio host Ron Wilson on 55WKRC and iHeart Radio to talk trees.
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20 Questions of Plant Diagnosis
JUL 24, 2025
Diagnosing plant problems is often a complex, multifaceted process that requires observation, investigation, and integration of site-specific knowledge. A structured diagnostic approach reduces guessw...
Anvil vs. Bypass: The Saga Continues
MAY 15, 2025
What we’ve been up to:
On a sunny day in April (the day before my birthday in fact) I spent a joyful hour in a field of young oak trees. Was I perusing the branches for birds or sitting idly with a b...
As readers of this blog and our work may know, codominant branches are unreliable predictors of tree failure during storms. At the same time, numerous studies have found that codominant branch union...
Woodland Edge Trees and Shrubs
APR 11, 2025
| Bottlebrush Buckeye | Aesculus parviflora |
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| Alleghany Serviceberry | Amelanchier laevis |
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| Devil's Walkingstick | Aralia spinosa |
| Red Chokeberry | Aronia ... |
Native herbaceous plants and shrubs
APR 11, 2025
| Bottlebrush Buckeye | Aesculus parviflora |
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| Red Buckeye | Aesculus pavia |
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| Alleghany Serviceberry | Amelanchier laevis |
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| Arkansas Amsonia | Amsonia... |
