Common Tree Care Questions
Straightforward answers to common questions about tree health, soil care, pruning, watering, and long-term tree management.
Common Tree Care Questions
Trees are long-lived organisms, and questions about their health do not always have simple yes-or-no answers. Tree species, age, growing conditions, recent weather, soil conditions, and property history can all influence what may be happening.
The following are brief answers to some of the questions property owners ask most often.
How can I tell whether my tree is healthy?
A healthy tree generally has foliage, growth, and canopy density appropriate for its species, age, and growing conditions. Healthy trees are not always perfect—small dead branches, minor insect feeding, and seasonal changes can be normal.
Changes that continue to worsen may deserve a closer look. These can include increasing canopy thinning, progressive branch dieback, unusually small leaves, reduced growth, early fall color, or significant changes from previous years.
Related Reading:
Signs Your Tree May Be in Trouble
Why are the leaves on my tree turning yellow?
Yellow leaves can have many possible causes, including drought, excessive soil moisture, poor drainage, root stress, soil conditions, nutrient availability, insects, disease, or normal seasonal changes.
Leaf color alone is usually not enough to determine the cause. The pattern, timing, affected branches, tree species, soil conditions, and recent changes to the property should also be considered.
Related Reading:
Signs Your Tree May Be in Trouble
Does my tree need fertilizer?
Not necessarily. Yellow leaves, reduced growth, or a thinning canopy do not automatically mean a tree needs fertilizer.
Before applying nutrients, it is important to consider soil conditions, moisture, root health, drainage, organic matter, and the underlying cause of the tree’s symptoms. In many landscapes, improving the root-zone environment may be more beneficial than simply encouraging additional aboveground growth.
When appropriate for the tree and site, UFT’s Deep Root Feeding program focuses on supporting the root-zone environment rather than simply encouraging rapid aboveground growth. The treatment incorporates organic matter, biochar, humates, beneficial biological components, and carefully selected nutrients to help improve soil conditions, support moisture and nutrient retention, and promote long-term tree health.
Deep Root Feeding may be especially beneficial where soils have been altered, compacted, depleted of organic matter, or affected by environmental stress. However, treatment recommendations should be based on the condition of the tree and its growing environment—not symptoms alone
Related Reading:
Building Healthy Soil Around Mature Trees
How often should I water a mature tree?
Watering needs depend on tree species, soil type, weather, drainage, root-zone conditions, and recent rainfall. During prolonged dry periods, mature trees may benefit from slow, deep watering across a broad portion of the root zone.
Frequent, shallow watering may encourage moisture near the soil surface without adequately supporting deeper soil moisture. Check the soil before watering—both excessively dry and overly saturated conditions can affect root function.
Related Reading:
Summer Tree Care Tips
How much mulch should I put around my tree?
A broad layer approximately 2–4 inches deep is appropriate in many landscape settings. Mulch should generally extend outward rather than being piled upward around the trunk.
Keep mulch away from direct contact with the bark, and avoid creating a “mulch volcano.” The root flare—the area where the trunk widens and transitions into the major roots—should remain visible.
Related Reading:
Mulching Done Right
Should I remove grass from around my tree?
Reducing grass competition around a tree can be beneficial, particularly for young trees or trees growing in compacted or stressful sites.
A properly maintained mulch area can reduce competition for water and nutrients, protect the trunk from mower and string-trimmer damage, moderate soil temperature, and gradually contribute organic matter to the soil.
Related Reading:
Mulching Done Right
When is the best time to prune a tree?
The appropriate timing depends on the tree species, pruning objective, tree condition, and the amount of pruning needed.
For many trees, dormant-season pruning can be beneficial. However, timing recommendations vary, and certain species require additional consideration. Pruning should focus on a clear objective rather than removing branches simply because pruning has not been performed recently.
For oak trees in Michigan, UFT recommends avoiding pruning from May through November to help reduce the risk of oak wilt.
Related Reading:
Preventing Oak Wilt on Your Property
Should I seal a pruning cut or tree wound?
In most situations, pruning paint or wound dressing is not recommended. Trees naturally respond to injury by forming boundaries around damaged tissues, and wound coatings do not replace proper pruning practices.
Oak wounds are an important exception during the oak wilt risk period. If an oak is accidentally wounded from May through November, the wound should be covered immediately with latex paint or an appropriate tree-wound dressing to reduce the likelihood of insect transmission.
Related Reading:
Preventing Oak Wilt on Your Property
Why does my tree have dead branches?
Some small dead branches can be a normal part of a tree’s development. Trees naturally shed branches that are shaded, damaged, or no longer productive.
Increasing or progressive dieback may indicate root stress, drought, construction damage, insects, disease, decay, vascular problems, or other environmental conditions. The size, location, amount, and pattern of deadwood are important considerations.
Related Reading:
Signs Your Tree May Be in Trouble
Are mushrooms growing near my tree a problem?
Not always. Mushrooms may grow from organic matter in the soil and may not be directly affecting the tree.
Fungal growth attached to the trunk, growing from major roots, or appearing near the root flare may deserve closer evaluation—especially when accompanied by cavities, decay, canopy decline, or structural concerns.
The significance depends on the type of fungus, where it is growing, and the condition of the tree.
Related Reading:
Signs Your Tree May Be in Trouble
Mushrooms Are Growing Near My Tree—Should I Be Concerned?
Can a declining tree be saved?
Sometimes. The answer depends on the underlying cause, severity of decline, tree species, site conditions, root health, structural condition, and how long the problem has been developing.
Management may involve improving soil conditions, correcting moisture problems, reducing additional stress, pruning, monitoring, or treating a specific insect or disease when appropriate. Some conditions cannot be reversed, but early evaluation may provide more management options.
Related Reading:
Should I Remove or Save My Tree?
When should I call an arborist?
Consider contacting an arborist when symptoms continue to worsen, multiple parts of the tree are affected, large branches are dying, construction has occurred near the tree, or cracks, cavities, decay, or fungal growth are present.
An evaluation may also be useful before beginning a treatment, removing a valuable tree, changing the landscape around a mature tree, or making decisions that may affect the root zone.
Related Reading:
When Should I Call an Arborist?
A Thoughtful Approach to Tree Care
Good tree care begins with understanding the tree, its growing environment, and the factors influencing its health.
Visible symptoms are important, but they do not always reveal the underlying cause. Looking at the entire tree—including the canopy, trunk, root flare, surrounding soil, site history, and recent environmental conditions—can lead to more informed long-term decisions.
Related Reading
HEALTHY SOIL. | STRONGER TREES. | LASTING LANDSCAPES.
Have a tree-care question that was not answered here? UFT Tree Care Specialists provides science-based tree diagnostics, consulting, and plant health care throughout Northern Michigan.
ufttree.care • ben@ufttree.care • 231-409-0442
