Featured Pollens

Sagebrush is native to Western Colorado and grows in large numbers on the National Monument, Uncompahgre Plateau and the sides of the Grand Mesa.

Ragweed is one of the most well known weed pollen in the United States. However, the Grand Valley has a surprisingly small amount of ragweed growing here.

Kochia is in the chenopod family of weeds, along with Russian Thistle, Lamb's Quarter and other weeds common to the Grand Valley.

Timothy grass is the predominant allergen seen in Mesa, Telluride, Aspen, Crested Butte and with people who ranch up on the Mesa, probably starting to grow around 7,000 feet.

In lower elevation regions of Western Colorado (<8,000 ft), orchard grass is the predominant wild grass growing and releasing pollen.

Bermuda grass is is prevalent in Grand Junction and Delta, but becomes less common at elevations equivalent to Montrose or higher.

Cottonwood is one of the top three pollinating trees in the Grand Junction, Montrose, Delta area. It peaks in mid-to-late March and early April, between Elm and Juniper.

These shrubs pollinate in early March, about one month earlier than their higher elevation natural Juniper counterparts.

Elm is one of the most common aeroallergens to trigger symptoms among allergy sufferers in Western Colorado and it holds a special spot as one of our "Top 3 Tree Pollens," sharing company with Juniper and Cottonwood.