Tree pollen levels in Portland are on the rise, causing symptoms of sneezing, itchy eyes, and difficulty breathing in those with tree allergies, and health officials recommend staying indoors, ...

According to the Asthma and Allergy Foundation of America, Portland has the 52nd worst pollen of major metropolitan areas.

A mix of perennial ryegrass and fine fescue is good for western Oregon. This will make a lawn that is rugged, will tolerate ...

Multiple allergy forecasters indicate 2025 is likely to be a pretty rough year for seasonal allergies. Pollen counts are expected to be higher than average in 39 states.

According to the Proceedings of the National Academy of Sciences of the United States of America, pollen amounts between 1990 ...

There are three types of pollen allergy to worry about, including tree, grass and weed. Impacts will be different across multiple areas of the country. For example, the Northeast and Great Lakes ...

Pollen season, encompassing tree, grass, and weed pollen, can last up to nine months, from February to October. Spring has begun and, in the South, it has been marked with a yellow dust covering ...