Based on 1,135 research-grade iNaturalist flowering observations in Pennsylvania, Red Trillium blooms mainly from April to May, peaking in April. It ranks #9 among wildflowers recorded in the state in our data.
Trillium erectum
Red Trillium in Pennsylvania by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also in bloom in Pennsylvania in April
Virginia Springbeauty
Lesser Celandine
Bloodroot
Virginia bluebells
Yellow Trout Lily
Dutchman's breeches
Large White Trillium
Red Deadnettle
Places to look in Pennsylvania
National ForestAllegheny National Forest
State ParkPresque Isle State Park
Botanical GardenJenkins Arboretum
State ParkCherry Springs State Park
State ParkColton Point State Park
State ParkLeonard Harrison State Park
FAQ
When does Red Trillium bloom in Pennsylvania?
Mainly April–May, with the most records in April.
How common is Red Trillium in Pennsylvania?
It ranks #9 by number of iNaturalist flowering observations among wildflowers in Pennsylvania (1,135 records in our sample).