Ruellia strepens

Smooth Petunia, also known as Limestone Petunia, is native to central and eastern United States and may be found in meadows, woodlands and streambank habitats. It’s listed as a threatened species in Pennsylvania. Leaves are green and lanceolate to ovate in shape. It produces light blue to light purple flowers, which bloom in the morning and fall off by evening. The entire plant will bloom for 2-3 months, putting out new flowers every day. The tubular flowers attract long tongued pollinators. This is a host plant to the Common Buckeye butterfly!

Sun Exposure

Full to Part Sun

Bloom Time

June to Sept

Soil Moisture

Moist to Medium

Plant Height

1-3 Feet

Host plant to

Common Buckeye Butterflies