A bloom calendar for Illinois built from 62,154 research-grade iNaturalist observations of plants in flower. April is the busiest bloom month. Pick a month to see what's flowering, or open a species for its state-by-state timing.
By month
Illinois wildflower calendar (top 40)
Fewer More observations (relative to each row's peak month)
Activity by month (all species)
Most-photographed wildflowers in Illinois
Virginia bluebells
Dutchman's breeches
Prairie Trillium
Bloodroot
Virginia Springbeauty
Eastern Shooting Star
Large White Trillium
Garlic Mustard
White Fawnlily
Field Bindweed
Red Columbine
Eastern Skunk Cabbage
Ohio spiderwort
Wild Geranium
Cut-Leaved Toothwort
Tall Bellflower
