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Gentian
Gentiana 'True Blue'

Family: Gentianaceae (jen-shun-AY-see-ee) (Info)
Genus: Gentiana (jen-shee-AN-uh) (Info)
Cultivar: True Blue
Additional cultivar information:(PP20433)
Hybridized by Probst
Registered or introduced: 2008

Category:

Perennials

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us

Height:

24-36 in. (60-90 cm)

Spacing:

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)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

N/A

Bloom Color:

Medium Blue

Bloom Time:

Mid Summer

Late Summer/Early Fall

Foliage:

Herbaceous

Other details:

Unknown - Tell us

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Patented

Propagation Methods:

By dividing the rootball

Seed Collecting:

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

Regional

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

Durango, Colorado

Old Saybrook, Connecticut

Belchertown, Massachusetts

Hubbardston, Massachusetts

Sandwich, Massachusetts

Walterville, Oregon

Wynnewood, Pennsylvania

Canyon Lake, Texas

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Gardeners' Notes:

0
positives
1
neutral
0
negatives
RatingContent
Neutral

On May 5, 2014, coriaceous from ROSLINDALE, MA wrote:

Upright, 15-20" tall. True blue flowers from late July into September. Moist well-drained soil in full sun to part shade.

Planted mine late last spring. It only produced a couple of flowers, and many of the stems blackened. I suspect it's in too much shade.

A cross between a G. scabra hybrid and a G. makinoi hybrid.

Hardy Z3-9.