Grass Pollen Map

Pollen Maps: What's In The Air? | Air Quality | Grass Pollen | Tree Pollen | Weed Pollen

Very High

Almost all individuals with any sensitivity at all to these pollens and molds will experience symptoms. Extremely sensitive people could have severe symptoms.

High

Most individuals with any sensitivity to these pollens and molds will experience symptoms.

Moderate

Many individuals sensitive to these pollens and molds will experience symptoms.

Low*

Only individuals extremely sensitive to these pollens and molds will experience symptoms.

None*

Allergy sufferers with sensitivity to these pollens and molds will probably not experience any symptoms.

* Early seasonal exposure to high amounts of air-borne allergens in individuals sensitive to allergy pollens will "prime" an individual to react to even the smallest amounts of pollens later in the season. Lower recorded daily pollen counts following higher seasonal pollination patterns may not provide any relief to allergy sufferers who have been repeatedly exposed to pollens during the season.

Grasses and Grasslike Plants

There are about 10,000 difference species of grass worldwide, of which 1,200 occur in North America. Grasses are ecologically dominant worldwide, and represent about 20% of the earth's vegetational cover.

If you are allergic to one type of grass, chances are you are probably allergic to several. Related are timothy, orchard grass, redtop, sweet vernal grass, rye, fescue, and Johnsongrass. Bermuda grass belongs to a different family. It is usually found in Southern states, and if kept trimmed, as in a lawn, it will not pollinate.

1) North and Mid Atlantic States

CT, ME, MA, NJ, NH, RI, PA, VT DE, District of Columbia, MD, NC, VA

Grasses pollinate from May through July. They include bromegrass, fescue, Johnsongrass, Junegrass (Kentucky bluegrass), orchard, redtop, rye, timothy, velvet grass, and vernal grass. Bermuda bluegrass is more prevalent in the more southerly states.

2) Southern Central and South Atlantic States

FL, GA, SC, AL, AR, LA, Mississippi (MS)

Grasses pollinate from mid March through October. In the southern tip of Florida, grasses pollinate all year round. They include Bermuda grass, canary grass, fescue, Johnsongrass, Junegrass (Kentucky bluegrass), redtop, rye, timothy, and vernal grass

In the southern tip of Florida, grasses pollinate all year round. The subtropical grasses include Bahia grass and salt grass.

3) Mid Western and Greater Ohio Valley

IN, KY, OH, TN, WV, IL, IO, MI, MN, MD, WI

Grasses pollinate from April through August. The main grasses to which people are sensitive to are Bermuda grass, bromegrass, Canada bluegrass, canary grass, corn fescue Johson grass, Junegrass (Kentucky bluegrass), orchard grass, redtop, rye, and timothy.

4) The Great Plains and the South Western Grasslands

KS, NB, ND, SD, OK and TX

Grass pollination season is April through August. The most important grasses are bromegrass, fescue, Junegrass (Kentucky bluegrass), redtop, rye, timothy, quack grass, and Western and crested wheatgrass.

5) Rocky Mountain States

CO, ID, MO, NM, UT, WY

Grasses pollinate from April through September. They include Bermuda grass, bromegrass, fescue, Junegrass (Kentucky bluegrass), orchard grass, quack grass, redtop, rye, and timothy.

6) SouthWestern Desert

NV, AZ and Southern CA

Grass pollination season is all year round. They include Bermuda grass, bromegrass, fescue, June grass (Kentucky bluegrass), orchard grass, redtop, rye, salt grass, and timothy.

7) NorthWestern States

ID, NV, Northern CA, OR, WA

Grasses pollinate February through November, with more northerly states closer to May through July. They include Bermuda grass, bromegrass, fescue, June grass (Kentucky bluegrass), orchard grass, redtop, rye, salt grass, and timothy. Canary grass and oat grass are included in northern coastal area.