Hosta 'Blue Mammoth'


Family: Liliaceae (lil-ee-AY-see-ee) (Info)
Genus: Hosta (HOSS-tuh) (Info)
Cultivar: Blue Mammoth
Hybridized by Aden-Ruh
Registered or introduced: 2010
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Plant Size (check one):

Giant (leaf >144 square inches; plant >28 tall)


4-6 ft. (1.2-1.8 m)


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)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

Sun Exposure:

Partial to Full Shade

Full Shade

Other details:

Unknown - Tell us

Patent Information:


Seed Collecting:

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

Growing Habit:


Growth Rate:


Leaf Shape:

Broadly Ovate

Leaf Appearance:



Degree to which the appearance is present:



Leaf Texture (top):

Glaucous Bloom

Leaf Texture (bottom):

Glaucous Bloom

Leaf Substance:

1 (Thick)

Leaf Color:

Medium Blue-Green

Intensely Blue-Green

Color of Leaf Margin:

No margin

Number of Vein Pairs:

more than 18

Appearance of Margin:

Flat/Nearly Flat

Margin Width:

No margin

Bloom Time:


Flower Shape:


Flower Fragrance:

No fragrance

Does it set seed?:

Yes; seed is viable

Bloom Color:

Near White

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


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

Atlanta, Georgia

Cordele, Georgia

Marietta, Georgia

Machesney Park, Illinois

Barbourville, Kentucky

Reading, Massachusetts

Dearborn Heights, Michigan

Plainwell, Michigan

Lothair, Montana

Sewell, New Jersey

Cicero, New York

Pittsboro, North Carolina

Cincinnati, Ohio

Glouster, Ohio

Norristown, Pennsylvania

Lexington, Virginia

Bluefield, West Virginia

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Gardeners' Notes:


On Jun 28, 2005, sterhill from Atlanta, GA (Zone 7b) wrote:

I had ordered 3 catmint from a vendor and got 1 catmint and two of these! I knew these were not catmint but couldn't tell what would come up when I planted them. Lovely plants! Need dividing now. Were planted in full sun (for the catmint) and do really well except for a bit of scorch in August. They do get a little shade from pine trees in the afternoon.


On Jun 27, 2005, sandy4 from Reading, MA wrote:

My most favorite blue of all. Its been growing in my yard over ten years. Large powdery blue leaves in spring turn to a blue-green in summer. Grows slowly but gets really large. Its still growing after ten years. Nice mounding habit and excessive flowers in older plants. I have grown seeds from mine and a great number resemble parent plant. Plant shows off after a rain. Holds droplets that reflect light. Looks like millions of white diamonds. Slug-proof when grown. Young plants need to be protected from slugs. Very sturdy leaves. This hosta gets an A+ in my opinion.


On Sep 1, 2002, jody from MD &, VA (Zone 7b) wrote:

Flower scapes 30"-36". Paul Aden intro.