Tree Pollen Season in CT: What To Expect in 2026

If spring allergies hit you hard every year, you’re not alone. In Connecticut and throughout Fairfield County, tree pollen is one of the earliest and most common triggers of seasonal allergy symptoms. Tree pollen season typically begins in late March and April and can last into early June, depending on weather conditions.

For many patients, tree pollen is responsible for sneezing, itchy or watery eyes, nasal congestion, postnasal drip, coughing, and worsening asthma symptoms. Because symptoms often start gradually, many people don’t realize allergies are the cause until they’ve already been uncomfortable for weeks.

In Connecticut, the most common trees that contribute to spring allergies include:

• Oak
• Maple
• Birch
• Elm
• Ash
• Hickory

Tree pollen grains are small and easily carried by wind, which means even people who don’t spend much time outdoors can still experience symptoms.

Seasonal allergies are more than just a nuisance. Untreated allergies can interfere with sleep, concentration, work productivity, and outdoor activities. In children, allergies may contribute to fatigue, irritability, and difficulty focusing in school. In patients with asthma, pollen exposure can increase the risk of coughing, wheezing, and shortness of breath.

Because tree pollen season starts early in the spring, many patients mistakenly attribute symptoms to lingering colds or sinus infections.

At Advanced Specialty Care, our Allergy & Asthma specialists offer comprehensive evaluation and treatment for seasonal allergies, including tree pollen sensitivities. Treatment options may include:

• Allergy testing (skin testing or blood testing) to identify specific tree pollen triggers

• Medication management, such as antihistamines or nasal sprays

• Allergen immunotherapy (allergy shots, tablets, or drops) to help reduce your immune system’s reaction over time

Immunotherapy is the only treatment that addresses the underlying cause of allergies—not just the symptoms—and can provide long-term relief.

The earlier allergies are identified and treated, the better symptoms can be controlled throughout the season. If you wait until pollen levels peak, it may take longer to get relief. Even if spring has already started, it’s not too late to get evaluated and create a plan.

If tree pollen allergies are affecting your quality of life, our Allergy & Asthma team is here to help. Advanced Specialty Care offers appointments with board-certified Allergy & Asthma specialists in Danbury, New Milford, Ridgefield & Norwalk.

📅 Schedule your appointment online today and breathe easier this spring.