Allergies & Pollen Count for Plymouth, Washington
Discussion
The quantity of pollen grains in the air for Sunday will be falling but will remain in the high range. This lowering of pollen concentrations is a result of falling temperatures, rising relative humidity and weaker winds.
Allergy Facts
Quack grass, a grass which was naturalized from Europe, is a nuisance that plagues farmers. This plant flowers (i.e., sheds pollen) from July to September and can cause hay fever symptoms in people with grass pollen allergies.