If your trees in Fort Collins look a little rougher than usual this year, you’re not imagining it. Several summers of drought and heat have left many trees across Northern Colorado running on empty, and stressed trees are far more vulnerable to pests and disease than healthy ones. What starts as a few yellow leaves or a thin patch of needles can turn into a much bigger problem if it’s ignored. At Top-Notch Tree Service, our ISA certified arborists see this pattern every summer, and catching it early makes all the difference. Here’s what’s happening to Fort Collins trees right now, and what you can do about it.
How Drought Stress Sets Trees Up for Bigger Problems
A healthy tree has enough energy reserves to fight off insects and recover from minor damage on its own. A tree that’s been short on water for one or two summers in a row doesn’t have that same reserve. It puts most of its energy into basic survival, which leaves very little left over for defense.
This matters because pests and diseases rarely take down a fully healthy tree on their own. They target trees that are already weakened, the same way a cold is more likely to turn into something serious in a person who’s already run down. Once a tree is stressed, even a modest pest population can do damage that a healthy tree would have shrugged off.
Fort Collins has seen several summers in a row with below average precipitation, and the region’s clay heavy soils don’t hold moisture particularly well to begin with. That combination means many trees have been running a deficit for longer than most homeowners realize. A tree can look fine on the surface for a season or two while the stress quietly builds underneath, which is part of why problems often seem to appear all at once.
What Are the Warning Signs of a Stressed Tree?
Leaf and Needle Changes
Yellowing leaves, needles turning brown from the inside out, or leaves dropping earlier than expected in the season are some of the clearest signs something is wrong. On evergreens, watch for needle loss concentrated on the interior of the branches rather than just the tips. These changes often show up gradually, so it helps to compare how a tree looks this month to how it looked a few months ago.
Bark and Trunk Clues
Small holes in the bark, material resembling sawdust at the base of the trunk, or sections of bark that are peeling or cracking can all point to insect activity underneath. Sap or resin oozing from the trunk is another sign worth taking seriously, since healthy trees don’t usually produce it without a reason. If you notice any of these signs, it’s worth having a professional take a closer look before the problem spreads.
Common Pests and Diseases Affecting Colorado Trees Right Now
Bark Beetles
Bark beetles are one of the biggest threats to stressed pines and spruces across the Front Range this year. These insects target trees that are already struggling with drought, since a healthy tree can usually push beetles out with its own natural defenses. Once beetles establish themselves in a tree, treatment options become limited, which is why early detection matters so much.
Ips Beetles and Other Engraver Beetles
Ips beetles, sometimes called engraver beetles, are especially active in pines and spruces during dry summers like this one. They tend to attack trees that are already weakened rather than healthy ones, boring into the bark and disrupting the tree’s ability to move water and nutrients. Because the damage happens under the bark, it’s often further along than it looks by the time it’s noticed from the ground.
Fungal Issues Tied to Stress
Fungal diseases tend to move in once a tree’s defenses are already down from heat and drought. Cankers, dieback on individual branches, and discolored patches on leaves or bark are common signs. Some fungal issues can be managed with proper pruning and care, while others require more targeted treatment from a certified arborist.
Can You Save a Drought-Stressed Tree?
In many cases, yes, especially if the problem is caught early. Deep, slow watering during dry stretches, mulching to retain soil moisture, and removing dead or damaged branches can all help a stressed tree recover its strength. The International Society of Arboriculture notes that proper watering and care during drought conditions is one of the most effective ways to help trees rebuild their natural defenses over time.
That said, some trees are too far gone to recover, particularly if a pest infestation has already spread through a large portion of the trunk or canopy. A certified arborist can tell you honestly whether a tree is worth trying to save or whether it’s become a safety risk that needs to come down. It’s a hard call to make on your own, which is why an honest, in person assessment matters so much.
Should You Still Water Trees During Restrictions?
Many Fort Collins neighborhoods put watering restrictions in place during the driest parts of summer, and homeowners often assume that means their trees need to go without. In most cases, local water rules allow for hand watering trees and shrubs even when lawn irrigation is limited, since trees represent a much bigger long term investment than turf. A slow soak at the drip line, right where the roots actually take up water, uses far less water than most people expect.
If you’re not sure what your local restrictions allow, a quick call to your water provider can clear that up. Prioritizing your most valuable or established trees over grass is usually the smarter move when water is limited, since a lawn can recover in a season while a mature tree may take years to replace. A little planning now can prevent a much more expensive removal later.
What Does Professional Tree Health Care Involve?
Our tree health care visits start with a full assessment of your property, not just the tree you’re worried about, since pests and stress often affect more than one tree at a time. From there, we recommend a plan built around what your specific trees need, whether that’s supplemental watering guidance, targeted treatment for an active pest, or pruning to remove dead and damaged wood before it becomes a bigger issue. Every recommendation is explained in plain terms, so you know exactly why we’re suggesting it.
We’re upfront about what a treatment plan will and won’t accomplish. If a tree needs ongoing care over a season or two to fully recover, we’ll tell you that up front rather than promising a quick fix that isn’t realistic. Honest expectations now save you frustration and unnecessary cost later.
When Should You Call a Professional Instead of Handling It Yourself?
Basic watering and mulching are things most homeowners can manage on their own without any special training. Diagnosing what’s actually causing a tree’s decline is a different matter, since drought stress, pest damage, and fungal disease can all produce similar looking symptoms from a distance. Treating the wrong problem wastes time the tree may not have, especially once an infestation is already underway.
A certified arborist can identify what’s actually going on and recommend treatment that matches the real cause, not just the visible symptom. This matters most for trees near a house, driveway, or power line, since a declining tree in those spots isn’t just a landscaping concern, it’s a safety one. If you’re ever unsure whether a tree needs a simple fix or a professional evaluation, it’s worth erring on the side of getting it looked at.
Simple Steps to Support Your Trees Through Late Summer
Deep watering once a week, rather than frequent shallow watering, encourages roots to grow deeper where they’re better protected from heat. A layer of mulch around the base of the tree, kept a few inches back from the trunk itself, helps the soil hold moisture longer between waterings. Avoid heavy pruning during the hottest part of summer, since it can add stress right when a tree needs its energy most.
If you’re noticing signs of stress in your trees or just want a second opinion before a small issue turns into a bigger one, our Fort Collins tree care team is ready to help. Healthy trees add real value to your property, and a little attention now can save you a much bigger problem down the road. Get in touch with us today for a free assessment and a plan built around your property.