Photo by Melody

PlantFiles: Princess Flower, Glory Flower
Tibouchina urvilleana 'Athens Blue'

Family: Melastomataceae
Genus: Tibouchina (tib-OO-kee-nuh) (Info)
Species: urvilleana (ur-VIL-ah-nuh) (Info)
Cultivar: Athens Blue
Additional cultivar information: (aka Compacta)

4 members have or want this plant for trade.

Tropicals and Tender Perennials

18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

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

Unknown - Tell us

Bloom Color:

Bloom Time:
Late Summer/Early Fall
Mid Fall
Late Fall/Early Winter


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
From softwood cuttings

Seed Collecting:
Unknown - Tell us

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3 positives
1 neutral
No negatives

Gardeners' Notes:

Neutral jasminebugli On Aug 16, 2011, jasminebugli from Jamshedpur
India (Zone 10a) wrote:

It does not do well in full sun . The leaves get burn . I have this plant in a pot in Partial Shade.

Positive Dragon1946 On Aug 1, 2011, Dragon1946 from North Highlands, CA wrote:

I live in Sacramento,Ca. , . My princess flower has gone through 2 winters with some dead stems that I cut off.Still thriving and about 3 foot tall.I think this winter I might try a small set of miniture christmas lights to ward off the frost.

Positive JonthanJ On Jan 23, 2010, JonthanJ from Logansport, IN wrote:

While it is not hardy in Zone 5, T. "Athens Blue" is a wonderful storable tropical. Stored before serious frost, in the dark, at about 45 degrees, it will defoliate but be ready to sprout new growth on the branches in the spring. The tricky consideration is that the new growth is very frost tender. The appropriate response is to keep it inside till June, either in the very cool storage, or in some sort of conservatory. This is not as much of a problem as it might seem because the bloom comes at the end of the summer or even later, in loose clusters at the end of every healthy branch. The display is generous, but for most of the summer it will just be a noteworthy foliage plant. If the fall is long and mild, you will see some pleasing leaf color changes.

The one I got last spring was outside too early. After the frost damage, the store gave it to me as unsaleable. There were further difficulties over the summer so that it is only just now blooming in my greenhouse.

Positive jessicab77 On Jun 15, 2009, jessicab77 from Austin, TX wrote:

I love this plant. The flowers are sooo beautiful and the bush itself is equally wonderful. I would caution those in Austin that full sun in the summer burns the leaves, I have just moved mine to part shade to see if it improves.


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

, (2 reports)
Lillian, Alabama
Lincoln, California
Marysville, California
Pittsburg, California
Beverly Hills, Florida
Hobe Sound, Florida
Jacksonville, Florida (3 reports)
New Smyrna Beach, Florida
Tallahassee, Florida
Tampa, Florida
Trenton, Florida
Fayetteville, North Carolina
Garner, North Carolina
Nashville, Tennessee
Austin, Texas

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