IN pollen report
Indianapolis Pollen Report
Indianapolis sits in the middle of Indiana's farm-and-forest country, and its allergy calendar is classic Midwest: oak and maple in spring, lawn and field grasses through summer, and some of the heaviest ragweed counts in the country each fall. Corn and soybean country surrounds the metro, and harvest season stirs up dust and mold on top of the pollen.
Collection coming soon to Indianapolis
PollyMap is actively recruiting a verified local partner in Indianapolis. 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 Indianapolis
No allergy clinic is reporting from Indianapolis 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 Indianapolis
Trees: oak, maple, and elm (March – May)
Oaks (Quercus), maples, and elm dominate the spring, with April typically the peak month across the metro.
Grasses: fescue and Timothy (May – July)
Lawn fescue and Timothy grass (Phleum pratense) pollinate heavily in June — Indiana's worst month for grass-allergic residents.
Weeds: ragweed (August – frost)
Indiana is core ragweed territory. Common and giant ragweed (Ambrosia) line every field edge and road cut, and fall counts are reliably high until the first hard frost.
Mold: harvest-season spikes
Humid summers keep Alternaria and Cladosporium active, and fall harvest stirs up additional mold and dust from surrounding farmland.
Pollen patterns in Indianapolis
In Indianapolis, 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
Indianapolis 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 Indianapolis
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Indianapolis today?
PollyMap publishes real, microscope-verified pollen counts for Indianapolis — 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 Indianapolis right now?
Indy's worst stretches are April (trees) and September (ragweed), with grass pollen heavy in June. The measured reports on this page show today's actual levels.
When is allergy season in Indianapolis?
March through the first hard frost: trees in spring, grasses in early summer, heavy ragweed from August onward, and mold through the warm, humid months.
Why is fall so bad for allergies in Indianapolis?
The metro is surrounded by some of the best ragweed habitat in the Midwest. September ragweed counts are consistently high, and harvest activity adds mold and dust at the same time.
Are you an allergy clinic in Indianapolis? 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 Indianapolis, 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 Indianapolis metro — like a franchise territory. Indianapolis has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Indianapolis 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.
From Carmel and Fishers to Greenwood and Avon, the Indy metro has room for multiple PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Indianapolis 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 Indianapolis
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