What Causes Grass Allergies?

Grasses generally release pollen from late spring to early summer - between May and end of July.

Grass can be found almost everywhere and, although there are more than 1,200 species of grass growing in North America, most of them do not cause allergies.

Grasses that are a common source of allergies include:

  • Bermuda grass: a lawn or pastural grass that can also be found growing in the cracks of sidewalks
  • Kentucky blue grass: a pastural grass with bluish-green leaves
  • Johnson grass: a very tall perennial grass that grows in excess of two meters in height
  • Timothy grass: a tall grass often grown for cattle forage or for making hay

Other grasses known to cause allergies are:

  • Bahia
  • Orchard
  • Meadow fescue
  • Ryegrass
  • Redtop
  • Sweet vernal