Gentiana Species, Closed Gentian, Bottle Gentian, Gall Flower, Sampson's Snakeroot

Gentiana andrewsii

Family
Gentianaceae (jen-shun-AY-see-ee)
Genus
Gentiana (jen-shee-AN-uh)
Species
andrewsii (an-DROO-see-eye)
Synonym
Cuttera catesbei
Dasystephana andrewsii
Pneumonanthe andrewsii
Sun Exposure
Sun to Partial Shade
Foliage
Deciduous
Height
12-18 in. (30-45 cm)
Spacing
6-9 in. (15-22 cm)
Hardiness
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)
Bloom Color
Dark Blue
Blue-Violet
Medium Purple
Bloom Time
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
Patent Information
Non-patented
Propagation Methods
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Jewett City, Connecticut

Saint Charles, Illinois

Waukegan, Illinois

Oakland, Maryland

Shelburne Falls, Massachusetts

Worcester, Massachusetts

Bay City, Michigan(2 reports)

Dearborn, Michigan

Midland, Michigan

Saint Paul, Minnesota(2 reports)

Joplin, Missouri

Saint Louis, Missouri

Munsonville, New Hampshire

Panama, New York

Van Etten, New York

Lake Toxaway, North Carolina

Mount Airy, North Carolina

Bethlehem, Pennsylvania

Colver, Pennsylvania

Pittsburgh, Pennsylvania

Whitehall, Pennsylvania

Wynnewood, Pennsylvania

Leesburg, Virginia

Appleton, Wisconsin

Muscoda, Wisconsin

Wild Rose, Wisconsin

show all

Featured Videos

Gardener's Notes:

3
positives
1
neutral
0
negative
Sort By:
Sort By:
C
Bethlehem, PA | March 2016 | positive

This funky flower has been growing trouble free in my semi-sun Zone 6 bed for many years. The foliage is a nice dark green, and the "bud...Read More

L
| October 2013 | neutral

I have just purchased a few of these and intended to pot them up to overwinter indoors or on the deck, but the seller was adamant that th...Read More

M
Joplin, MO | December 2009 | positive

I ordered this plant several years ago as Gentiana septemfida but as it grew and began to bloom, I discovered that it was instead andrews...Read More

T
Bay City, MI (Zone 5a) | September 2005 | positive

I originally found this plant growing under a grove of pine trees. I dug it up and transplanted it into my sun garden. I was surprized to...Read More

Featured
Aloe Species
(Aloe swynnertonii)
Chequered Blue
(Theclinesthes serpentata)
Green Woodpecker
(Picus viridis)
Featured
Aloe Species
(Aloe swynnertonii)
Chequered Blue
(Theclinesthes serpentata)
Green Woodpecker
(Picus viridis)