How can you tell if a tree is not healthy?

Author: Miss Vernice Walsh  |  Last update: Monday, June 8, 2026

What does an unhealthy tree look like?

Peeling or loose bark or cracks in the tree around the tree's root collar. Swelling, soft or decaying wood, or small holes in the tree trunk. Dead, dying, or drooping branches in the canopy. Wilting, discolored, or damaged leaves.

How do you check the health of a tree?

Check Roots

Cavities or hollows near the base of the tree or in large roots can also be a sign of trouble. Cracked or raised soil on one side of a tree trunk could indicate the start of leaning and weakness. New construction and soil compaction can also damage roots.

When to be concerned about a tree?

Probably the most visible (and most obvious) of the tree hazards, a broken or hanging limb is a telltale sign that your tree is, in fact, a danger. However, limb damage isn't always so obvious. A professional tree inspector will look for splits and cracks to determine how severe the damage is.

How to determine if a tree should be cut down?

Vertical cracks, seams, dead branch stubs and large, older wounds suggest internal decay. Severe damage to the main trunk often warrants removal of the tree. If the damaged area is less than 25 percent of the circumference of the trunk, the wound could gradually heal over and no permanent injury should result.

Signs of a Sick Tree

How do you tell if a tree is diseased or dying?

When should you cut a tree down?

How do you diagnose a sick tree?

How can you tell if a tree is unsafe?

What are the symptoms of tree deficiency?

Your local county Agricul- tural Extension office can assist you with problem identifica- tion. A few common visual symptoms of nutrient deficien- cies are small chlorotic leaves, dead areas of leaf tips and margins or between veins, dieback of stem tips and twigs, bark lesions and excessive gum formation.

How do you treat an unhealthy tree?

Who can diagnose tree problems?

If you're concerned about your tree's health, contact an arborist. Certified arborists handle planting, pruning, fertilizing, pest control, and tree removal.

How do you identify a tree health?

Recognizing Disease

Warning signs of insect infiltration or disease can include: visible insects, fruit trees lacking fruit or flowers, leaf distortion, holes in bark, irregular growth on the branches, and oozing sap on evergreens. Be wary of wilting leaves and drooping stems.

What does a stressed tree look like?

Stressed tree symptoms will manifest in a number of ways. Distorted or missing growth, substances or spots on foliage, and lack of vigor are some of the first clues that your tree is stressed.

When to give up on a tree?

How to check tree health?

What does a sick tree look like?

Leaf problems: A diseased tree often has problems with its leaves. They could have holes, be discolored, or look like they're shriveling up. In deciduous trees, look for branches that have only brown and brittle leaves during the growing season.

How do you diagnose a dying tree?

How do I make sure my tree is healthy?

Trees do best with infrequent, deep waterings. Prune trees only when it is necessary for structure, health, and safety purposes. Remove vines, turf, or competing vegetation surrounding the tree's trunk.

How to nurse a tree back to health?

How do you treat a sick tree?

Should you cut down a sick tree?

Diseased Trees

An infected tree can spread disease to other trees and plants in the area, causing significant damage. If you notice signs of disease, such as dead branches, discolored leaves, or fungus growing on the trunk, it's time to remove the tree before it causes any more damage.

When not to cut trees?

During the spring, diseases and harmful insects are no longer dormant, and when you trim your trees in the spring, they can spread to other trees. In addition, trees that are trimmed in the spring may not have enough time to heal, making them more susceptible to unwanted pests and diseases.

How to know if a tree needs to be removed?

A tree with a hollow trunk has been seriously compromised and is a hazard. If a third of the tree is rotted or hollow inside, it needs to be removed. The tree is suddenly leaning. All leaning trees aren't necessarily dangerous, but a tree that suddenly leans to one side may have structural problems.

What months should you not trim trees?

Spring flowering trees should be pruned after flowers have dropped. To avoid the introduction of disease pathogens to oaks and elms, avoid pruning between April 15 and October 15.