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Wild Petunia

Ruellia humilis

Wild Petunia

General Information

Wild Petunia is an easy-to-grow, clump-forming herbaceous perennial. Given the right habitat it can become aggressive.

Wild Petunia is typically found in open woods, glades, prairies and fields. It prefers full sun and drier soils.

Wild Petunia has showy lavender flowers and blooms during the hottest, driest times of summer (July to August).

Plant Information

Plant Type:

Herbaceous perennial

Sun Preference:

Full Sun

Soil Moisture Preference:

Medium * Medium-Dry * Dry

Plant Height:

1 foot

Plant Width:

1 to 2 feet

Plant Spacing:

1 to 1.5 feet

Flower Color:


Flower timing:

June to August

Culture Information:

Wild Petunia makes an excellent ground cover. It works best in borders, rock gardens, native plant gardens, wild gardens or prairies, and rain gardens. It tends to spread vigorously and readily reseeds.

When first planted, Wild Petunia should be watered weekly for first few months, unless at least an inch of rain has been received in the last week to help it get established. After it becomes established, Wild Petunia does not typically need watering.

If desired, Wild Petunia can be cut back to the ground in late fall or over winter.


Dry Soil
Shallow-Rocky Soil

Pests & Disease:

Wild Petunia typically has no serious insect problems.

Wild Petunia doesn’t usually have serious disease problems.

Wildlife Use:

Pollinators: Wild Petunia is especially attractive to long-tongued bees and butterflies. It is a larval host plant for the Common Buckeye Butterfly.

Birds: The seeds provide food for songbirds.

Mammals: N/A.

Other: N/A.

Native to:

More Information:
NC State Plant Database:
Missouri Botanical Garden:
TN-KY Plant Atlas

Other Link:

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