Grass pollen season begins in early March and doesn’t end until grasses stop releasing pollen in mid-October. As grass releases pollen into the air, the wind can carry it for miles on dry, sunny days. Pollen counts are usually lower on damp or cool days. Grass pollen is microscopic. Though you may not see it in the air, if you’re allergic to grass pollen, you may experience a reaction even to small amounts of it.

Grass pollen is prevalent from March to October.

Grass Allergy Information

Grass allergies are a common type of seasonal allergy that affects many people, especially during the spring and summer months. The symptoms of grass allergies can be quite uncomfortable and may include sneezing, runny nose, itchy eyes, and even asthma in some cases. 

Grass allergies are common throughout the United States, but they are most prevalent in areas with a lot of grass and other vegetation. In general, the Midwest and Northeast regions of the country tend to have higher levels of grass pollen than the West and Southwest regions. However, grass allergies can affect people in any part of the country, and the severity of symptoms can vary from year to year depending on factors such as weather patterns and the amount of rainfall.

The peak grass allergy season in the United States typically starts in late spring and lasts through the summer months. In general, the specific timing of grass allergy season can vary depending on the region of the country and the type of grasses that are prevalent in that area. However, in most parts of the country, grass allergy season tends to peak in May and June, with some areas experiencing high pollen levels through July and August.

Several types of grasses can cause allergies, but some are more likely to trigger symptoms than others. Here are some of the most common types of grasses that are known to cause allergies:

  • Timothy grass: This is one of the most common culprits of grass allergies in the United States. Timothy grass is found in most parts of the country and can produce large amounts of pollen.
  • Bermuda grass: Bermuda grass is a warm-season grass that is common in the southern part of the United States.
  • Orchard grass: Orchard grass is a cool-season grass that is common in the Northeast and Midwest regions of the United States. I
  • Ryegrass: Ryegrass is a cool-season grass that is commonly used for landscaping and in pastures.
  • Kentucky bluegrass: Kentucky bluegrass is a cool-season grass that is commonly used in lawns and athletic fields.

It's important to note that different people can have different allergies, and some may be more sensitive to certain types of grasses than others. If you suspect that you have a grass allergy, you should consult with an allergist who can help determine which types of grasses may be causing your symptoms.

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