You wouldn’t plant tomatoes in February. Tree pruning is no different — cut at the wrong time and you invite disease, stress your trees, and undo a season of healthy growth. Cut at the right time and your trees reward you with stronger structure and fewer problems for years to come.

At Advanced Tree Care, the most common question we hear from homeowners across Lincolnshire, Vernon Hills, Lake Forest, Libertyville, and throughout Lake and Cook Counties is: “Is now a good time to trim my tree?” The answer depends on the species and the season. Here’s the straight answer.

Why Pruning Timing Matters

A well-timed cut heals fast, produces the growth response you want, and leaves trees less exposed to insects and fungal pathogens. A poorly timed cut does the opposite — slowing wound closure, attracting bark beetles, or opening the door to diseases like Oak Wilt that can kill a mature tree within a single season.

In northern Illinois, getting the timing right isn’t just good practice. In some cases, it’s the difference between a tree that thrives for 50 more years and one that needs to come down.

Seasonal Overview for Lake & Cook Counties

Winter (December – February): The safest window for most deciduous trees. Trees are dormant, disease vectors are inactive, and bare canopies make structure easy to see. Most of our structural pruning happens in these months.

Early Spring (March – April): Good for storm damage cleanup, but avoid structural cuts on oaks and elms — this is peak Oak Wilt and Dutch Elm Disease season.

Late Spring / Early Summer (May – June): Prime time to prune spring-flowering trees right after bloom. Light corrective work on maples is fine once fully leafed out.

Summer (July – August): Deadwood removal and light maintenance only. Trees are heat-stressed — avoid heavy structural cuts.

Fall (September – November): Decay fungi peak in autumn and wounds close slowly. Stick to dead branch removal and leave structural pruning for winter.

When to Prune Common Trees in Lake & Cook Counties

Oak Trees — Avoiding Oak Wilt in Illinoi

Best time: December – early March | Avoid: April – July, absolutely

Oak Wilt is the most critical pruning timing issue for Illinois homeowners. Sap-feeding beetles that spread the disease are most active April through July. A single fresh cut on an oak during this window can introduce Oak Wilt — and red oaks, common throughout Lake and Cook Counties, can die within weeks of infection.

The Illinois Department of Natural Resources recommends: do not prune oaks between April 1 and July 31. If a safety emergency forces a summer cut, paint the wound immediately with latex paint. Our ISA-certified arborists schedule all oak work between December and early March — don’t let any crew touch your oaks in spring or summer without confirming they know Oak Wilt protocol.

Maple Trees

Best time: Late February, or midsummer (July – August) | Avoid: March – early May

Maples “bleed” heavily if pruned during spring sap flow. The sap won’t kill the tree, but wounds close slowly and the tree is unnecessarily weakened. Prune in late February before sap rises, or wait until fully leafed out in June or July.

Crabapples, Cherries & Spring-Flowering Trees

Best time Immediately after flowering (late May – mid June) | Avoid: Fall

If you’re reading this in late May — right now is your window.

Spring-flowering trees set next year’s buds in late summer, so prune too late and you lose next spring’s display. Shape the canopy right after bloom while the tree still has time to harden new growth before summer heat. For crabapples, sterilize tools between every cut to prevent fire blight spread.

 Elms

Best time: December – mid-April | Avoid: Mid-April – October

Dutch Elm Disease spreads via bark beetles that follow nearly the same seasonal pattern as Oak Wilt vectors. Prune in late winter. If storm damage forces an in-season cut, remove and dispose of the wood away from healthy elms — don’t leave it on the ground.

Evergreens (Pines, Spruces, Arborvitae)

Best time: Late spring for pines (new candle extension); early spring or late summer for spruce and arborvitae | Dead branches: Anytime

Most conifers won’t regenerate from bare old wood, so technique matters as much as timing. For pines, prune in late spring when new candles are extending but not yet hardened. For spruces and arborvitae, early spring or late summer both work. Avoid heavy pruning in fall.

What to Do Right Now — Late May in Lake & Cook Counties

Do now: Prune crabapples, cherries, and redbuds if bloom has faded. Remove deadwood from any species. Light corrective pruning on maples.

Wait: No structural work on oaks or elms until December — Oak Wilt is at peak risk right now.

Call us immediately if you see: A limb hanging over your home, sudden leaf scorch on an oak (possible Oak Wilt), fungal growth at the base of a trunk, or any crack at a major branch union. Safety hazards don’t follow seasonal rules — we serve Lincolnshire, Vernon Hills, Lake Forest, Libertyville, Gurnee, Buffalo Grove, Deerfield, Highland Park, and throughout Lake and Cook Counties.

Serving the Northern Suburbs — Why We Take This Seriously

Advanced Tree Care is based in Lincolnshire and serves a 25-mile radius covering some of the most tree-rich residential neighborhoods in the Chicagoland area — from the lakefront communities of Lake Forest and Highland Park to the wooded subdivisions of Vernon Hills, Libertyville, and Buffalo Grove. All of our pruning follows ANSI A300 standards, the same benchmark used by certified arborists and professional tree care organizations across the industry.

Frequently Asked Questions

Can I prune my oak tree in May in Illinois? No. May is peak Oak Wilt risk season. Schedule oak pruning for December through early March when disease-spreading beetles are dormant.

What’s the best time to trim trees in summer in Illinois? July and August are fine for deadwood removal and light maintenance.

Avoid heavy structural cuts — trees are already stressed by heat.

How often should trees be pruned?

Most arboricultural guidelines recommend professional trimming every 5 to 7 years for mature trees. Trees near structures or with known disease history should be assessed annually.

Is fall pruning okay in Illinois?

Not ideal. Decay fungi peak in fall and wounds close slowly before winter. Wait for full dormancy in late November or December for any significant work.

Schedule a Free Pruning Assessment

Our ISA-certified arborists serve Lincolnshire, Vernon Hills, Lake Forest, Libertyville, Gurnee, Buffalo Grove, Deerfield, Highland Park, Northbrook, and surrounding Lake and Cook County communities. Whether it’s oak scheduling, a post-bloom crabapple trim, or a tree you’re just not sure about — we’ll give you a straight, honest answer.
(847) 587-8500

Request a free estimate today and let’s make sure your trees are on the right schedule this season.

Here’s something we see every spring as ISA-certified arborists in Lincolnshire: more trees are damaged by too much water than too little.

If you have a sprinkler system, there’s a good chance it’s quietly stressing your trees — even while your lawn looks great.

Water at 7–9 AM. Not midday. Not at night.

Morning is the only time that makes real sense.

The soil absorbs what it needs, and the surface dries naturally through the day. No wasted water, no moisture sitting on bark overnight.

Midday — most of the water evaporates before it reaches the roots.

You’re paying for water your trees never receive.

After 7 PM — moisture sits on bark and soil all night with no sun to dry it. That’s how fungal problems start. Damping off, fungal spots, rust, rhizosphaera needle cast, leafspot, powdery mildew — we diagnose these in Lincolnshire trees every season, and evening watering is almost always part of the story.

If you missed the morning, 5–6 PM works — there’s still enough light and warmth for things to dry before dark.

Your sprinkler system is built for your lawn, not your trees

This is the conversation we have with homeowners more than almost any other.

Lawn grass needs frequent, short watering cycles. Trees need deep, infrequent soaks. When your irrigation system runs the same schedule for both, your trees are getting hit at the base three or four times a week — far more than they need.

Watch especially for water spraying onto plant material. Sprinkler systems spraying arborvitae and spruce directly is one of the most common causes of needle cast and fungal decline we see in this area.

Rust and Rhizosphaera needle cast in particular are largely irrigation-driven diseases — and they almost always trace back to heads that were never adjusted as the trees grew.

Signs your irrigation is harming your trees:

Yellowing leaves despite the tree looking otherwise healthy Soil around the base that never fully dries out Moss or algae on the bark near ground level White mushrooms appearing at the base in a pattern around the root zone — this is where root rot lives. By the time you’re seeing mushrooms, the damage is already underway, and the cause is almost always water that had nowhere to go Leaves wilting even though the soil is wet — this is mushy roots from root rot, not drought.

Older systems — a common problem in our suburbs

Many homes here have irrigation systems that are 15–30 years old. The heads were aimed at open lawn when they were installed. Since then, your trees have grown — but the heads haven’t moved.

Five things to check right now:

-Run every zone and watch it. Walk the yard while the system runs. Look for heads with water spraying onto plant material, stuck rotary heads, and pooling water that isn’t absorbing.

-Redirect heads near trees. Most heads can be adjusted without replacing them. Keep water on the lawn, away from trunk bases and foliage.

-Separate your schedule if you can. Trees once a week, deeply. Lawn two to three times a week, shorter. If your system can’t run separate zones — favor less frequent for everything.

-Check your run times. Illinois spring lawns typically need 20–30 minutes, once or twice a week. If your system is running daily from a schedule that was never updated — that’s too much.

-Add a rain sensor. Older systems often don’t have one, or it’s failed and bypassed. A basic sensor costs under $30 and stops your system from running the morning after it rained.

Do’s and Don’ts: Watering Trees the Right Way

Water deeply and infrequently — once a week at the drip line, not the trunk. Let the soil dry between waterings. Soil should be firm to the touch, not muddy or spongy. Firm, moist soil that dries between waterings is what a healthy root zone feels like. If it’s muddy, you’re already overwatering.	Don’t water at night. Moisture sitting on bark and soil with no sun to dry it creates the exact conditions for damping off, fungal spots, rust, Rhizosphaera needle cast, leafspot, and powdery mildew. Improper irrigation causes the biggest issues we see in landscaping — more than drought, more than pests, more than almost anything else. It’s behind more tree problems in this area than most homeowners realize.
Water in the morning between 7–9 AM. This gives roots time to absorb moisture and allows the surface to dry naturally before evening.	Don’t ignore mushrooms at the base of a tree. White mushrooms growing in a pattern around the root zone are a sign of mushy roots and active decay below the surface. By the time you’re seeing them, the damage is already underway.
Check your sprinkler zones individually. Walk the yard while the system runs and watch for heads directing water spraying onto plant material — arborvitae, spruce, and other evergreens are especially vulnerable.	Don’t wait if a tree looks distressed. A tree showing wilting, yellowing, or browning leaves despite wet soil isn’t struggling — it is already damaged. The window to intervene is shorter than most people expect.
Separate your irrigation schedule. Trees need water once a week, deep and slow. Lawn needs two to three shorter cycles. These should not be the same schedule.	Don’t let heads spray trunk bases or plant material. Keep water on the lawn where it belongs.
Install a rain sensor if you don’t have one — or verify your existing one is actually working.	Don’t mistake wet soil for healthy soil. Soil that’s consistently muddy is suffocating roots, not feeding them.

We’re not an irrigation company and don’t service irrigation systems — but as ISA-certified arborists, we can walk your property, assess what your trees are showing us, and give you clear recommendations on what your watering schedule is doing to them. Sometimes that conversation alone saves a tree.

When do trees actually need water?

Established trees — in the ground three or more years — are more drought-tolerant than most people realize. In a normal Illinois spring, they need very little help.

Water when: no significant rain for two or more weeks, leaves are curling or browning at the edges, or the tree was planted in the last 1–2 years.

Stop when: the soil 2–3 inches down is already moist, rain is coming in the next day or two, or you’re seeing any of the overwatering signs above.

When you do water — water at the drip line, not the trunk. Deep and slow, once a week. Not a little every day.

Our ISA-certified arborists assess tree health and catch issues early.

Advanced Tree Care — Cook & Lake County Free estimates: 847-587-8500

If you’ve recently searched for tree removal near you, chances are you’re dealing with a tree that doesn’t look quite right. Across Chicagoland—especially in Cook County and Lake County—changing weather patterns and strong storms can quickly turn a damaged tree into a serious hazard. Knowing when to call a professional tree removal company can help you avoid costly damage and keep your property safe.

Why Homeowners Look for Tree Removal Help

Trees in Northeast Illinois go through a lot: heavy snow, ice, strong winds, and summer storms. Over time, even healthy trees can become unstable. Many homeowners start looking for local tree removal services after noticing warning signs or storm damage around their home.

At Advanced Tree Care, we specialize in safe, professional tree removal throughout Cook County and Lake County, helping homeowners make informed decisions about their trees.

Signs You May Need Tree Removal

1. Root damage or instability
If roots are circling the trunk or lifting from the ground, the tree may be unstable. This is a common issue with maples and poplars in the Chicagoland area and often leads people to call for tree removal before the tree falls.

2. Cracks or decay in the trunk
A strong trunk is essential for stability. If you see cracks, hollow areas, mushrooms, or other fungus, it may be time to consider professional tree removal in Chicagoland before the next storm hits.

3. Weak or splitting branches
Large branches with narrow angles or visible splits can break suddenly. This is especially common in fast-growing species like silver maples and willows found throughout Cook and Lake Counties.

4. Storm damage
After severe weather, trees that are leaning, partially uprooted, or have hanging limbs should be evaluated immediately. These situations require prompt attention from trained tree removal professionals.

5. Insects or disease
Infestations and disease can weaken a tree from the inside out. If left untreated, the damage can spread to nearby trees, making removal the safest option for your Cook County or Lake County property.

Local Tree Removal You Can Trust

When you need reliable tree removal in your area, Advanced Tree Care is proud to serve homeowners across Chicagoland. Our certified arborists provide expert assessments, safe removals, professional tree trimming, stump grinding, plant health care, and emergency services when you need them most.

We’ve built our reputation on dependable tree services throughout Cook County and Lake County, helping local communities maintain safe and healthy landscapes. If you’re concerned about a tree on your property, contact Advanced Tree Care today to schedule an inspection or tree removal service you can trust.

While most homeowners wait for the warmth of spring to think about their landscaping, dormant pruning(pruning during late winter) is actually the most critical step you can take for the long-term health of your trees.

At Advanced Tree Care, we specialize in structural pruning during the winter months to ensure your canopy is resilient, healthy, and ready for a vibrant spring flusLate winter and early spring are some of the most important times of year for tree care in Illinois. Perhaps a winter storm has whipped through and your tree sustained serious damage. Or maybe it’s been declining for years, and you’ve decided it’s finally time to address the issue before spring growth begins.

Whatever the reason, many homeowners start their search with phrases like “tree trimming near me” or “tree service near me.” While proximity matters, choosing the right professional tree trimming service is even more important. 

Tree trimming and removal can be complex—and mistakes can be costly. Selecting an experienced, professional tree service led by a certified arborist helps protect your property, your safety, and the long-term health of your trees. 

 

What Should You Look For When Selecting a Tree Trimming Service?

Choose a Tree Trimming Service Led by a Certified Arborist

Proper tree care requires significant training, knowledge, and hands-on experience. A certified arborist understands tree biology, structural integrity, and the safest methods for trimming or removal.

When searching for a certified arborist in Illinois, look for a company that can assess whether a tree truly needs removal or if strategic pruning can preserve its health and stability. A tree trimming service led by a certified arborist—such as Advanced Tree Care—provides comprehensive, informed care rather than quick fixes.

Ensure the Tree Trimming Service Is Licensed, Bonded, and Insured

Tree work carries inherent risks. If something goes wrong, the responsibility should never fall on the homeowner.

Any professional tree service near you should be fully licensed, bonded, and insured. This protects you from liability and ensures the company meets industry and safety standards. Advanced Tree Care maintains proper licensing, bonding, and insurance so our clients can have peace of mind throughout every project.

Pick a Tree Trimming Service That Serves Your Area

When homeowners search for “tree service near me,” search results typically favor companies that clearly define their service area.

Tree trimming services operate within specific geographic regions, especially during busy seasons. Advanced Tree Care proudly serves multiple counties across Illinois, allowing us to respond efficiently to routine pruning needs as well as storm-related emergencies throughout the region.

Choose a Tree Service Known for Excellent Customer Care

Tree trimming is more than a technical service—it’s also a customer experience.

Choose a tree trimming service that:

• Answers calls promptly
  
• Shows up when scheduled
  
• Communicates clearly
  
• Completes work safely and thoroughly
  
• Leaves your property clean and restored
  

This level of reliability is especially important in late winter and early spring, when snow, ice, and wind damage can create urgent safety concerns. At Advanced Tree Care, customer service is a core part of how we operate.

Select a Tree Trimming Service That Uses Modern Technology

Today’s professional tree trimming services rely on advanced equipment and arborist technology to improve safety, efficiency, and results.

Modern tools allow certified arborists to:

• Perform precise pruning
  
• Reduce impact on surrounding landscapes
  
• Improve crew safety
  
• Complete projects more efficiently
  

At Advanced Tree Care, we equip our staff with cutting-edge arborist tools and technology to ensure high-quality tree trimming, tree removal, and ongoing tree maintenance services.

Professional Tree Trimming and Tree Removal in Illinois

Advanced Tree Care combines top-tier equipment, innovative technology, and highly trained staff to provide expert tree trimming, tree removal, and emergency tree services throughout Illinois.

If you’re researching tree trimming near you, tree removal, or need guidance from a certified arborist, our team is always available to answer questions and help you determine the best course of action for your property.

Advanced Tree Care isn’t just our name—it’s our purpose.

While most homeowners wait for the warmth of spring to think about their landscaping, dormant pruning(pruning during late winter) is actually the most critical step you can take for the long-term health of your trees.

At Advanced Tree Care, we specialize in structural pruning during the winter months to ensure your canopy is resilient, healthy, and ready for a vibrant spring flush.

 

Why Winter is the “Golden Window” for Pruning

Pruning while a tree is dormant isn’t just convenient—it’s scientifically superior for several reasons:

Reduced Stress: Because the tree isn’t actively putting energy into leaf production, it handles the “shock” of pruning much better than it would in June or July.

Maximum Visibility: Without leaves, our certified arborists can see the “bones” of the tree. This allows us to easily identify structural defects, crossed branches, or hidden decay that is obscured in the summer.

Faster Healing: Pruning in late winter allows the tree to begin the sealing process immediately when the spring growth surge hits, minimizing the time the “wound” is exposed.

Disease Prevention: Many pests and fungi (like Oak Wilt or Dutch Elm Disease) are dormant in the winter. Pruning now significantly reduces the risk of infection.

Selecting the Right Professional for the Job

As noted in our previous guides, tree care is complex. Winter pruning, specifically structural pruning, requires a high level of expertise. When selecting a service this season, ensure they meet these professional standards:

Feature	Why It Matters for You
Certified Arborists	Pruning is a science. Our team at Advanced Tree Care understands tree biology, ensuring cuts are made to promote health, not just “clear space.”
Licensed & Insured	Winter conditions can be unpredictable. We are fully bonded and insured to protect your property and our crew from any liability.
Advanced Technology	We utilize the latest arborist tools and communication tech to provide efficient, safe, and precise service, even in harsh weather.
Regional Expertise	Serving 3 counties in Chicagoland, we understand the specific climate stressors affecting local species during the winter months.

The Advanced Tree Care Difference

We don’t just “cut branches.” We utilize a combination of top-notch equipment and well-trained staff to restore your property to tip-top shape. From 24-hour emergency removals to strategic seasonal maintenance, Advanced Tree Care isn’t just our name—it’s our purpose.