Crested Gentian
Gentiana septemfida

Family: Gentianaceae (jen-shun-AY-see-ee) (Info)
Genus: Gentiana (jen-shee-AN-uh) (Info)
Species: septemfida (sep-TEM-fee-duh) (Info)

Category:

Alpines and Rock Gardens

Height:

6-12 in. (15-30 cm)

Spacing:

9-12 in. (22-30 cm)

12-15 in. (30-38 cm)

15-18 in. (38-45 cm)

Hardiness:

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)

Sun Exposure:

Sun to Partial Shade

Danger:

Unknown - Tell us

Bloom Color:

Medium Blue

Dark Blue

Bloom Time:

Late Summer/Early Fall

Foliage:

Herbaceous

Blue-Green

Other details:

Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

7.9 to 8.5 (alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored

Regional

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

Parker, Colorado

Mount Prospect, Illinois

Plainfield, Illinois

Pownal, Maine

Bridgewater, Massachusetts

Jamaica Plain, Massachusetts

Norton, Massachusetts

Bend, Oregon

Mount Hood Parkdale, Oregon

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Gardeners' Notes:

1
positive
1
neutral
0
negatives
RatingContent
Positive

On Aug 3, 2011, edselby from Littleton, CO wrote:

This plant is spectacular at the Betty Ford Alpine Garden in Vail, Colorado, so it obviously grows well at altitude and cold winter conditions. The plants there are about 15"-18" in both height and width. Wish I could get them to grow in Denver.

Neutral

On Jan 17, 2007, bluespiral from (Zone 7a) wrote:

For those who'd like to try germinating this tricky-for-some plant, following are some methods that have worked for a few intrepid souls:

1) Tom Cothier's method: Sow @ 18-22*C [~64-71*F] for 2-4 wks; then move to -4 to 4*C [24-39*F] for 4-6 wks; then move to 5-12*C [41-53*F] for germination.

2) Rob's Plants method: Sow at 70*F using the baggy method. In 2002, he got 55% germination in 7 - 10 days, but these factors varied from year to year. He notes that this plant is especially susceptible to damping off fungus and suspects it germinates best with fresh seed

Rob's baggy method: Sow the seed on a moistened (damp not soaking) coffee filter paper; fold it over the seed; and placed the arrangement inside a ziplock baggie under growl... read more