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Trimming your trees at the wrong time can do more harm than good. In Missouri, the best window for most species is late winter, when trees are dormant, disease risk is low, and the bare canopy makes it easy to spot problem areas. This guide breaks down the ideal trimming schedule for each season and the most common tree species in West St. Louis County, so you know exactly when to pick up the phone and when to leave the pruning shears in the garage
Trees add beauty, shade, and value to your property, but they don't last forever. When a tree becomes diseased, structurally compromised, or poses a safety risk, removal is often the smartest decision you can make to protect your home and family.
The tricky part is knowing when a tree has crossed the line from "could use some attention" to "needs to come down." Below, we'll walk through the most common warning signs that indicate it's time to call a professional for an assessment.
Disease is one of the most common reasons trees need to be removed. Unfortunately, by the time symptoms are visible on the outside, the damage inside the tree is often already extensive.
Mushrooms or shelf-like fungal growths (also called conks) growing at the base of a tree or along the trunk are a major red flag. These fungi feed on decaying wood inside the tree, meaning the internal structure is already weakened. A tree that looks perfectly healthy on the outside can be completely hollow inside.
Healthy trees naturally shed small pieces of bark as they grow, but large sections of missing bark or deep vertical cracks in the trunk are signs of serious decline. This is especially concerning on mature hardwoods common throughout West St. Louis County, like oaks and maples, where trunk integrity is critical to the tree's ability to support its canopy.
A few dead branches here and there can often be addressed with trimming. But when 50% or more of the canopy is dead, or when dead branches are concentrated on one side, the tree is likely in an advanced stage of decline. Dead branches are also a falling hazard. They can drop without warning, especially during storms.
Not all dangerous trees look sick. Some trees develop structural issues that make them unsafe even though they appear green and healthy.
Some trees naturally grow at a slight angle, and that's perfectly normal. What isn't normal is a tree that has started leaning more than it used to, especially if you notice exposed roots or cracked soil on the opposite side of the lean. A sudden lean after a storm is an emergency situation because the root system may already be compromised.
Roots are the foundation of a tree's stability. If you can see roots lifting out of the ground, or if recent construction, grading, or soil compaction has damaged the root zone, the tree may no longer be anchored securely. Root issues are especially common after utility work or driveway installations.
When a tree splits into two main trunks that form a tight V-shape, the junction is structurally weak. Over time, bark can become trapped in the crotch, preventing the wood from fusing properly. These trees are at high risk of splitting apart during wind, ice, or heavy snow, all of which are common in the St. Louis area.
Sometimes a tree is perfectly healthy but still needs to be removed because of where it's growing.
In these cases, removal isn't about the tree being in poor health. It's about protecting your property and infrastructure. This is particularly common in established neighborhoods across Ballwin, Manchester, and Ellisville where mature trees have outgrown their original planting sites.
Missouri storms can do serious damage to trees. After a storm, you'll need to assess whether the tree can recover or whether removal is the safer and more cost-effective option.
A tree that has lost more than 50% of its canopy from storm damage is unlikely to recover fully. Similarly, if the main trunk is cracked or split, the structural integrity is permanently compromised. Even trees that survive a major storm event may develop decay at the wound sites over the following years, becoming a delayed hazard.
If your tree has been storm-damaged, it's worth having a professional evaluate it before making a decision. What looks catastrophic isn't always a lost cause, and what looks minor can sometimes hide bigger problems.
Removal isn't always the only answer. In many cases, professional trimming can extend a tree's life by removing dead or hazardous branches while preserving the healthy structure. Cabling and bracing can also stabilize trees with weak crotches or codominant stems.
However, there are situations where trimming simply isn't enough. If the trunk is compromised, the root system is failing, or more than half the tree is dead, removal is the responsible choice. Trying to save a tree that's too far gone often just delays the inevitable and gives the tree more time to cause damage.
If you've noticed any of the warning signs above, the best next step is to get a professional evaluation. A trained arborist can assess the tree's health, structural stability, and risk level and give you an honest recommendation on whether removal, trimming, or monitoring is the right call.
At Ballwin Tree Service, we provide free on-site assessments for homeowners throughout West St. Louis County. We'll take the time to explain exactly what we're seeing and walk you through your options so you can make an informed decision.
If you're concerned about a tree on your property, contact us today to schedule a free evaluation.
