Ruellia strepens

Common name: Smooth Petunia

Native plant

Smooth Petunia has large purple blooms that occur in the leaf axils of the plant.  Make sure to pay attention, though!  Each flower only lasts about a day.  Blooming period occurs during the height of summer for 2 to 3 months. This plant prefers some shade and will often suffer from leaf scorching if placed in full sun. Seeds are produced in pods that explode when ripe, projecting seeds outward, and causing this plant to move around a bit in the garden by reseeding.  This can be prevented by removing seed pods.


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Price Level: 
Perennial- Standard
Sizing Options: 
Flat of 32 (plugs)
Flat of 18 (pints)
1 Gallon


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Plant Details

Plant type


Soil type

Mesic (Not too Wet Not too Dry), Moist Mesic

Light exposure

Full Sun, Partial Sun / Part Shade

Bloom period


Urban environment

Uncompacted Urban Soils


Savannas, Woodlands

Growth form

Ground cover, Rhizomatous/stoloniferous

Growth rate


Flower color


Fall color

Orange Yellow


Mature height
2 Feet
Mature width
2 Feet
Max height
3 Feet
Max width
3 Feet

Additional information

Pollinator hot spot

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