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PlantFiles: Wild Petunia
Ruellia humilis

 
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Family: Acanthaceae (ah-kanth-AY-see-ee) (Info)
Genus: Ruellia (roo-EL-ee-uh) (Info)
Species: humilis (HEW-mil-is) (Info)

10 vendors have this plant for sale.

11 members have or want this plant for trade.

Category:
Perennials

Height:
6-12 in. (15-30 cm)

Spacing:
18-24 in. (45-60 cm)

Hardiness:
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)

Sun Exposure:
Partial to Full Shade

Danger:
N/A

Bloom Color:
Violet/Lavender

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Herbaceous

Other details:
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Non-patented

Propagation Methods:
From seed; direct sow outdoors in fall

Seed Collecting:
Bag seedheads to capture ripening seed
Allow pods to dry on plant; break open to collect seeds

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By pstanley
Thumbnail #1 of Ruellia humilis by pstanley

By Toxicodendron
Thumbnail #2 of Ruellia humilis by Toxicodendron

By Kaufmann
Thumbnail #3 of Ruellia humilis by Kaufmann

By mrgreengenes
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By Equilibrium
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By Equilibrium
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By Equilibrium
Thumbnail #7 of Ruellia humilis by Equilibrium

There are a total of 16 photos.
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Profile:

2 positives
3 neutrals
1 negative

Gardeners' Notes:

RatingAuthorComment
Neutral grrrlgeek On Nov 4, 2009, grrrlgeek from Grayslake, IL (Zone 5a) wrote:

Native in the US from TX to MN, east to PA, south to FL. Endangered in MD, PA, and WI, threatened in NC and MI.

Negative cam2 On Mar 11, 2009, cam2 from Houston, TX wrote:

This is a noxious evergreen weed in my yard ~ I fight it in every flowerbed and between bricks on the patio! It is pretty in bloom and the foliage is nice; if it were just more easily controlled.

Positive frostweed On Nov 30, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Wild Petunia Ruellia humilis is native to Texas and other States.

Neutral Gamblemoore1987 On Nov 12, 2003, Gamblemoore1987 from St. Louis, MO (Zone 6a) wrote:

In St. Louis this reseeds but does not last the winter. Hardy, warm season, full sun, annual.

Positive Terry On Aug 31, 2002, Terry from Murfreesboro, TN (Zone 7a) wrote:

Talk about an easy-to-grow plant. This grows wild in the cow pasture behind our property. The blooms don't have the staying power of the annual petunias but the fact it's a perennial and virtually care-free make up for the lack of profuse blooms.

Neutral talinum On Aug 8, 2001, talinum from Kearney, NE (Zone 5a) wrote:

Low spreading perennial for dry shade. Misty lavender miniature petunia-shaped blooms throughout summer. Flowers slightly more than 1" acoss. Prefers high heat and humidity. Will reseed occasionally.

Regional...

This plant has been said to grow in the following regions:

Huntington, Arkansas
Keystone Heights, Florida
Hampton, Illinois
Lincoln, Illinois
Wichita, Kansas
Taylorsville, Kentucky
Mathiston, Mississippi
Cole Camp, Missouri
Frenchtown, New Jersey
Elizabeth City, North Carolina
Columbus, Ohio
New Hope, Pennsylvania
Beaufort, South Carolina
Conway, South Carolina
Saint Helena Island, South Carolina
Murfreesboro, Tennessee
Alice, Texas
Arlington, Texas
Austin, Texas
Houston, Texas



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