St. Louis homeowners know our weather rarely does anything halfway. Ice storms, heavy snowfalls, wind storms, tornadoes, remnants of hurricane weather, temperatures in triple digits, flooding and more are nothing new to our area. Our recent months which included a winter with limited moisture, followed by rapid weather changes and a wet spring is nothing unusual, but it’s also a weather one-two punch that can leave evergreen trees struggling to adjust.

In a typical year, St. Louis receives about six inches of precipitation during the winter months and nearly 10.5 inches during spring, but the timing of that moisture matters just as much as the total amount.

These changing conditions can create evergreen tree stress throughout the region. While some damage may be obvious, other warning signs can be easy to miss.

If your arborvitae, spruce, pine, or other evergreen trees don’t look quite as healthy as they did last year, now is the time to take a closer look.

Winter Stress Can Cause Evergreen Tree Damage Months Later

Evergreen trees don’t completely shut down during the colder months. Unlike deciduous trees that lose their leaves and enter dormancy, evergreens continue losing moisture through their needles throughout winter.

The challenge is that frozen or dry soil can limit the amount of water available to the roots. When rainfall and soil moisture are limited, trees may enter spring already under stress.

The effects of winter stress on evergreen trees don’t always appear immediately. A tree that experienced environmental stress may not show symptoms until weeks or even months later—when needles begin browning, branches thin out, or new growth appears weaker than expected.

A Wet Spring Doesn’t Always Reverse Evergreen Tree Stress

After a dry period, homeowners often assume spring rainfall will solve the problem.

Unfortunately, trees don’t recover quite that quickly.

A sudden shift from dry conditions to wetter weather can create additional challenges. Stressed trees may have weakened natural defenses, making them more vulnerable to fungal issues, root problems, or insect activity.

Think of it this way: A tree that has been struggling for months doesn’t instantly bounce back just because conditions improve. Recovery takes time, proper care, and attention.

What Signs of Evergreen Tree Damage Should Homeowners Watch For?

A walk around your property can reveal a lot. Take a close look at your evergreens and watch for signs of stress, including:

• Browning needles, especially at branch tips or throughout large sections
• Thinning foliage or bare areas
• Dead branches that were previously healthy
• Excessive needle drop
• Discoloration that continues spreading
• Signs of insect activity or fungal growth

Keep in mind that some needle loss is completely normal. Evergreens naturally shed older needles as part of their growth cycle.

The concern is when browning, thinning, or decline appears excessive or continues to worsen.

Don’t Assume Your Evergreen Trees Will Recover on Their Own

One of the most common mistakes homeowners make is waiting too long to address tree problems.

Sometimes stressed trees recover with proper care and improved growing conditions. Other times, underlying issues continue developing until treatment options become limited.

Early identification is key. An experienced arborist can help determine whether your tree is dealing with environmental stress, disease, insect damage, or a combination of problems.

The sooner the cause is identified, the more options you typically have.

Proper Evergreen Tree Care Starts With Understanding the Problem

Healthy trees are an investment. They add beauty, shade, privacy, and value to your property. Protecting that investment requires more than reacting after damage becomes severe.

Regular inspections, proper watering practices, and professional guidance can help keep evergreens healthier through Missouri’s unpredictable weather patterns.

At Hansen’s Tree Service, our ISA Certified Arborists understand the challenges local trees face throughout the seasons. If your evergreens are showing signs of stress or decline, contact Hansen’s Tree Service for an evaluation.

Identifying problems early can help protect your landscape and keep your trees healthy for years to come.