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PlantFiles: Fringed Gentian
Gentiana detonsa

Family: Gentianaceae (jen-shun-AY-see-ee) (Info)
Genus: Gentiana (jen-shee-AN-uh) (Info)
Species: detonsa (de-TON-sa) (Info)

Synonym:Gentiana thermalis
Synonym:Gentiana holopetala
Synonym:Gentianopsis detonsa

5 members have or want this plant for trade.

Alpines and Rock Gardens

6-12 in. (15-30 cm)

6-9 in. (15-22 cm)

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)

Sun Exposure:
Full Sun
Sun to Partial Shade

Unknown - Tell us

Bloom Color:
Dark Blue

Bloom Time:
Mid Summer


Other details:
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By Toxicodendron
Thumbnail #1 of Gentiana detonsa by Toxicodendron

By MartyJo
Thumbnail #2 of Gentiana detonsa by MartyJo

By boojum
Thumbnail #3 of Gentiana detonsa by boojum

By boojum
Thumbnail #4 of Gentiana detonsa by boojum


2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive picante On Feb 7, 2007, picante from Helena, MT (Zone 4b) wrote:

The fringed gentian is the official flower of Yellowstone National Park. In many summers of working in Yellowstone, I saw it infrequently, sometimes in the geyser basins.

Positive Toxicodendron On Sep 24, 2004, Toxicodendron from Piedmont, MO (Zone 6a) wrote:

A striking wildflower found throughout the Rocky Mountains. There are many forms in this species, and most botanists now consider them to be geographic variations so I have included a couple of them in the synonyms.


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

Fayette, Iowa
Shelburne Falls, Massachusetts
Midland, Michigan
Yellowstone National Park, Wyoming

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