MI pollen report
Grand Rapids Pollen Report
Grand Rapids anchors West Michigan's orchard and farm country — a landscape that buries the region in pollen each year. Oak and maple drive the spring, orchard and pasture grasses carry the summer, and ragweed fills the fall. Lake Michigan's moisture keeps the growing season lush and the mold season long.
Collection coming soon to Grand Rapids
PollyMap is actively recruiting a verified local partner in Grand Rapids. 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 Grand Rapids
No allergy clinic is reporting from Grand Rapids 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 Grand Rapids
Trees: oak, maple, and birch (April – June)
Oak (Quercus) and maple dominate the canopy, with birch adding a highly allergenic May peak.
Grasses: Timothy and bluegrass (May – August)
Orchard grasses and Timothy hay across West Michigan pollinate heavily in June.
Weeds: ragweed (August – frost)
Ragweed (Ambrosia) thrives in the region's farmland, with counts elevated until the first frost.
Mold: lake-effect humidity
Lake Michigan's moisture keeps Alternaria and Cladosporium active through summer, with spikes as leaves fall in autumn.
Pollen patterns in Grand Rapids
In Grand Rapids, tree pollen — including Maple, Oak, Birch — typically dominates from late winter through spring. Bluegrass grass is the most common warm-season pollinator, and Ragweed drives the largest fall pollen load.
Top trees
- Maple
- Oak
- Birch
- Ash
- Walnut
Top grasses
- Bluegrass
- Timothy
- Orchard
- Rye
Top weeds
- Ragweed
- Lamb's quarters
- Pigweed
- Plantain
Top molds
- Alternaria
- Cladosporium
- Aspergillus
- Penicillium
Grand Rapids 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 Grand Rapids
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Grand Rapids today?
PollyMap publishes real, microscope-verified pollen counts for Grand Rapids — 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 Grand Rapids right now?
Grand Rapids' worst stretches are May (oak, birch), June (grasses), and September (ragweed). The measured reports on this page show today's actual levels.
When is allergy season in Grand Rapids?
April through the first hard frost: trees in late spring, grasses in summer, ragweed in the fall, and mold through the humid months.
Does Lake Michigan affect pollen in Grand Rapids?
Yes — lake moisture feeds lush vegetation and humidity, extending grass and mold seasons compared to inland northern Michigan.
Are you an allergy clinic in Grand Rapids? 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 Grand Rapids, 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 Grand Rapids metro — like a franchise territory. Grand Rapids has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Grand Rapids 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.
Grand Rapids, Wyoming, Kentwood, and Holland each make natural PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Grand Rapids 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 Grand Rapids
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