ID pollen report
Boise Pollen Report
Boise's high-desert setting in the Treasure Valley runs a surprisingly full allergy calendar. Juniper and elm start the spring, cottonwoods line the Boise River with late-spring pollen, irrigated lawns and pasture grasses carry the summer, and sagebrush and ragweed close out the fall. Dry wind across the valley keeps pollen traveling.
Collection coming soon to Boise
PollyMap is actively recruiting a verified local partner in Boise. Be the first to know — or apply to be the partner.
While we find a local clinic
Test the air at your own home in Boise
No allergy clinic is reporting from Boise yet. Until one does, you can order your own PollyKit — a simple air sampler you hang outdoors or indoors. Send it back and the PollyKit Lab shows you exactly what's floating in your air.
- Pollen from local trees, grasses and weeds
- Airborne mold spores
- Dust mites and other indoor allergens
Hang it outdoors
See which pollen and mold are in your yard this season.
Or hang it indoors
Check bedrooms and living spaces for mold, dust mites and more.
What drives allergies in Boise
Trees: juniper, elm, and cottonwood (March – June)
Western juniper and Siberian elm open the season in March; cottonwoods (Populus) along the Boise River greenbelt peak in May.
Grasses: bluegrass and Timothy (May – July)
Irrigated lawns and surrounding pasture grasses pollinate heavily in June — the Treasure Valley's peak grass month.
Weeds: sagebrush and ragweed (August – October)
Big sagebrush (Artemisia tridentata) dominates the surrounding desert, and ragweed fills disturbed lots — fall's main triggers.
Mold: low, but irrigation-driven
The dry climate keeps outdoor mold low overall, with modest spikes in irrigated landscapes and after rare summer storms.
Pollen patterns in Boise
In Boise, tree pollen — including Juniper, Cedar, Cottonwood — typically dominates from late winter through spring. Brome grass is the most common warm-season pollinator, and Sagebrush drives the largest fall pollen load.
Top trees
- Juniper
- Cedar
- Cottonwood
- Pine
- Aspen
Top grasses
- Brome
- Bluegrass
- Fescue
Top weeds
- Sagebrush
- Ragweed
- Russian thistle
Top molds
- Cladosporium
- Alternaria
Boise pollen calendar
Typical monthly intensity across the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tree | ||||||||||||
| grass | ||||||||||||
| weed | ||||||||||||
| mold |
Historical reports
Cities near Boise
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Boise today?
PollyMap publishes real, microscope-verified pollen counts for Boise — measured from physical air samples. The latest report on this page shows current tree, grass, weed, and mold levels.
Is the pollen count high in Boise right now?
Boise's worst stretches are April–May (elm, juniper, cottonwood), June (grasses), and September (sagebrush, ragweed). The measured reports on this page show today's actual levels.
When is allergy season in Boise?
March through October: trees in spring, grasses in early summer, and sagebrush and ragweed in the fall.
Do desert climates help allergies?
Not automatically. Boise's irrigated valley adds lawns, pastures, and river-corridor cottonwoods to the native juniper and sagebrush — so the metro has a real pollen load despite the dry air.
Are you an allergy clinic in Boise? Claim your territory on PollyMap.
PollyMap is a local authority-building tool for allergy clinics, ENT practices, and any clinic that offers allergy care. By becoming the Official PollyMap Partner for your part of Boise, your clinic gets credited on real pollen reports, receives ready-to-share weekly content, and becomes the go-to local expert patients trust.
We assign each partner a designated territory within the Boise metro — like a franchise territory. Boise has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Boise yet. The best areas go to the first clinics that sign up — once one does, that part of town is off the table for everyone else.
The Treasure Valley is growing fast — Boise, Meridian, Nampa, and Eagle each make PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Boise pollen report
- Weekly real-sample reports and ready-to-share content under your brand
- Locked territory — competing clinics can't claim your area
- Become the go-to allergy expert in your part of Boise
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