Photo by Melody

PlantFiles: Desert Petunia, Florida Bluebells, Mexican Petunia, Mexican Blue Bells
Ruellia tweediana 'Purple Fountain'

Family: Acanthaceae (ah-kanth-AY-see-ee) (Info)
Genus: Ruellia (roo-EL-ee-uh) (Info)
Species: tweediana (twee-dee-AH-nuh) (Info)
Cultivar: Purple Fountain

Synonym:Ruellia brittoniana

9 members have or want this plant for trade.

Tropicals and Tender Perennials

36-48 in. (90-120 cm)

15-18 in. (38-45 cm)

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)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun


Bloom Color:

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Blooms repeatedly


Other details:
May be a noxious weed or invasive
Drought-tolerant; suitable for xeriscaping
Self-sows freely; deadhead if you do not want volunteer seedlings next season

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:

Propagation Methods:
By dividing the rootball
From herbaceous stem cuttings

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Click thumbnail
to view:

By Andrew60
Thumbnail #1 of Ruellia tweediana by Andrew60

By joeswife
Thumbnail #2 of Ruellia tweediana by joeswife

By joeswife
Thumbnail #3 of Ruellia tweediana by joeswife


2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive LeBug On Nov 26, 2005, LeBug from Greenville, IN (Zone 6a) wrote:

I esp. love the mound, I have pink, white, and purple, along with the taller purple and pink fountain. The only thing with the mounds is the flowers drive me crazy because they stick to the foliage, I go around trying to unglue them all the time lol

Positive cheryldawn On Aug 21, 2004, cheryldawn from Lakeland, FL wrote:

I love my Mexican Petunias. Mine are the non invasive type, not the more wild invasive variety. Mine have stems resembling hardwood bamboo type canes. They have a tropical look. Can be planted as a tropical type hedge about 12" apart.. Mine have gotten as tall as about 24". They might have gotten a little taller but I take cuttings from them often, so they stay at around 24 " or less. Very attractive foliage. They're evergreens here in Florida. They bloom profusely from spring till early fall. Very hardy, drought tolerant. Not much except overwatering seems to bother them. They can be easily propagated from cuttings as small as 2".
Flowers are delicate looking, but hardy. They last a day.
Have had no pests bother mine so far. We just had a hurricane and although it took down a big piece of my grandfather oak tree, knocked down two other trees, and blew over or destroyed a lot of plants. Not one of my more then one dozen Mexican petunias were damaged.
I really fell in love with it two years ago after realizing that it was out-doing all my other plans, even native ones, as far as hardiness.( This is for the non invasive Mexican Petunias, Not the wild invasive ones.)
Flowers bloom early in the morning till around 3:00-4:00PM It's just been a joy to have them. I find myself going outside several times a day, just to gaze at the lovely pink flowers. It was the best $ 2.95
I ever spent. I've gotten over a dozen plants from it.
I LOVE this plant!


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

Surprise, Arizona
Altamonte Springs, Florida
Lakeland, Florida
Greenville, Indiana
Derby, Kansas
Slidell, Louisiana
Lancaster, South Carolina
Alice, Texas
Beaumont, Texas
Deer Park, Texas
San Antonio, Texas
Zapata, Texas

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