Limestone Wild Petunia
Ruellia strepens
Last reviewed: August 2026
Ruellia strepens (Limestone Wild Petunia) is a native forb blooming June through September across the eastern and central United States. This adaptable wildflower attracts bees, butterflies, and hummingbirds to gardens and natural areas.
Toxicity unknown
Limestone Wild Petunia (Ruellia strepens) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
The USDA PLANTS Database (opens in new tab) does not flag Limestone Wild Petunia as toxic to livestock.
Light
part sun
Water
medium
Size
12"–36" H × 6"–18" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, DE, FL and 22 more states
Pollinators
bees, butterflies, hummingbirds
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 445 programs across 44 states, each with a link to the provider and the date we last checked it.
Find rebates in your areaBrowse plants for this ecoregion
Limestone wild petunia is a native perennial that produces delicate purple flowers from summer through early fall. This compact plant forms neat clumps and works well in partly sunny areas with average moisture.
Growing Limestone Wild Petunia
Grow Limestone Wild Petunia in part sun and medium water. Mature plants reach 12 to 36 inches tall and spread 6 to 18 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Limestone Wild Petunia is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- May look sparse in winter when dormant
Wildlife value
The tubular flowers attract bees, butterflies, and hummingbirds throughout the long blooming season. This native plant provides excellent pollinator support from June through September.
Common questions
- When does Limestone Wild Petunia bloom?
- Ruellia strepens blooms from June through September, providing nectar for pollinators throughout the summer and early fall.
- What pollinators visit Limestone Wild Petunia?
- This native wildflower attracts bees, butterflies, and hummingbirds with its tubular purple flowers and abundant nectar.
- Where is Ruellia strepens native?
- Limestone Wild Petunia is native to much of the eastern and central United States, from Texas and Florida north to Michigan and Pennsylvania.
- What growing conditions does Limestone Wild Petunia prefer?
- This adaptable forb tolerates a wide range of light conditions from full sun to partial shade and various moisture levels from dry to wet soils.
- Is Limestone Wild Petunia toxic to livestock?
- The USDA PLANTS Database does not flag Limestone Wild Petunia as toxic to livestock.
- Is Limestone Wild Petunia HOA-friendly?
- Limestone Wild Petunia is generally an HOA-friendly choice in the right placement, with low maintenance.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Limestone Wild Petunia? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz