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American Grass Pollen Allergy Guide

Are you just muddling through when you should be enjoying the sunny, warm weather? You might not see grass pollen in the air, but it could be the cause of a pollen allergy. When you breathe in grass pollen, your body might think it’s a virus or another harmful foreign invader. This causes your immune system to react and triggers allergy symptoms, leaving you feeling crummy during prime picnic, pool and outdoor exercising season. To learn more, here’s your guide to American grass pollen.

American Grass Pollen Allergy Guide from ZYRTEC®
What to Know

Grass Allergy Symptoms

Map of US grass pollen timing
Pollen is one of the most common causes of allergies in the U.S. Grass pollen is produced by a variety of grasses to fertilize other plants within the same species. Grass pollen is especially common during the summer.

Common Grass Allergy Sources

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Your perfectly manicured lawn isn’t necessarily the only culprit for a grass allergy. Pollen from tall grasses and unmowed lawns can be carried by the wind for miles, especially on dry, sunny days. There are more than 1,000 species of grass in North America, but only a few produce highly allergenic pollen. Explore these common pollinators.
Common Pollinators


Bahia grass
Where: Southeast
When: May–October


Bermuda grass
Where: All Regions Except the Northwest
When: May–October


Where: All Regions
When: January–July

Timothy Grass

Timothy Grass
Where: All Regions
When: June–August


Where: All Regions
When: June–October


Where: All Regions
When: April–October

Grass Allergy Symptoms

Grass allergy symptoms are similar to other pollen allergies. They can include a runny and/or stuffy nose, itchy eyes and sneezing. The severity of your symptoms depends on your body and the amount of grass pollen you’re exposed to.

Grass Allergy Treatment Tips

Here are our top 10 tips for preventing or treating grass allergies:

  1. During the grass blooming season in your area, try to avoid grass types that trigger your grass allergy symptoms. It’s a great excuse to get out of mowing the lawn.
  2. When outside, wear hats, gloves, glasses, paper masks and long-sleeve shirts to prevent contact with grass pollen.
  3. Remove your shoes before entering your home to avoid tracking pollen inside.
  4. Don’t forget your pets. Brush them off as soon as they come inside too to prevent pollen in your home.
  5. Vacuum often and run a HEPA air filter in your home to catch pollen that might have made its way in.
  6. After long periods outdoors, showering will help remove grass pollen from your skin and hair.
  7. The pollen count can be at its highest between 10 a.m. and 5 p.m. Avoid spending time outdoors during these hours.
  8. Weather affects allergies, so check the local weather forecast. Try to stay indoors on windy days or after a heavy rain shower.
  9. Check what’s in the air with the ZYRTEC® ALLERGYCAST® app*.
  10. To help find grass allergy relief and get back to enjoying the outdoors, learn more about the ZYRTEC® family of products.

* Standard data rates apply.

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