Arizona Triggers

The specific pollens, molds, and dust events that drive symptoms across Arizona.

Olive pollen is one of the most reactive allergens in Phoenix — peaking in spring and lingering for weeks.

Arizona mold isn't just a monsoon issue — Alternaria and Cladosporium spores are present year-round.

Even with low humidity, dust mites thrive in Arizona bedrooms and upholstery.

Scottsdale's mature landscaping means olive, mulberry, and mesquite pollens drive most allergy cases.

Dust storms, ozone, pollen, and post-monsoon mold all stress Phoenix asthma sufferers.

Bermuda grass pollen drives Arizona's summer allergy season — and it's nearly impossible to avoid.

Mulberry pollen is so allergenic it's banned for new planting across much of Arizona — yet mature trees still cause spring havoc.

Mesquite pollen overlaps with Arizona's late-spring season and is a major desert allergen.

Arizona's state tree is also a notable spring allergen, especially in foothill communities.