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Gentian 'Royal Blue'

Gentiana makinoi

Family: Gentianaceae (jen-shun-AY-see-ee) (Info)
Genus: Gentiana (jen-shee-AN-uh) (Info)
Species: makinoi (MACK-kin-oy) (Info)
Cultivar: Royal Blue



Foliage Color:


Bloom Characteristics:

Flowers are good for cutting

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


18-24 in. (45-60 cm)

24-36 in. (60-90 cm)


15-18 in. (38-45 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)

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


Unknown - Tell us

Bloom Color:

Dark Blue

Bloom Time:

Late Summer/Early Fall



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:

Unknown - Tell us

Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

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


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

Palmer, Alaska

Hendersonville, North Carolina

Tullahoma, Tennessee

Gardeners' Notes:


On Feb 4, 2015, Morganics from Tullahoma, TN wrote:

I acquired this plant from Munchkin Nursery in 2005. It languished for eight years in dry shade. Then I moved it to a southwestern exposure in bright dappled shade with abundant moisture and it took off like a rocket. Considering it was totally neglected and grazed by deer all those previous years, I must conclude that this plant is tough as nails. It was a stunner in late summer last year, and I fully expect it to be doubly stunning this year. I'm deciding right now what sort of "socks and shoes" plants to surround it with this year, as its quite tall and has no basal foliage. I may also buy two more of this gentian to create an eye-popping stand of true blue.