Hosta
Hosta 'Knockout'

Family: Liliaceae (lil-ee-AY-see-ee) (Info)
Genus: Hosta (HOSS-tuh) (Info)
Cultivar: Knockout
Hybridized by Aden
Registered or introduced: 1986
» View all varieties of Hostas

Plant Size (check one):

Medium (leaf 25-81 square inches; plant 10-18 tall)

Spacing:

18-24 in. (45-60 cm)

24-36 in. (60-90 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)

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)

Sun Exposure:

Light Shade

Partial to Full Shade

Full Shade

Other details:

Average Water Needs; Water regularly; do not overwater

Patent Information:

Unknown - Tell us

Seed Collecting:

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

Properly cleaned, seed can be successfully stored

Growing Habit:

Mound-like

Growth Rate:

Medium

Leaf Shape:

Ovate

Leaf Appearance:

Wavy

Flat

Degree to which the appearance is present:

Lightly

Leaf Texture (top):

Dull

Leaf Texture (bottom):

Dull

Leaf Substance:

1 (Thick)

Leaf Color:

Slightly Blue-Green

Medium Blue-Green

Color of Leaf Margin:

Yellow

Number of Vein Pairs:

Fewer than 9

Appearance of Margin:

Flat/Nearly Flat

Margin Width:

1/64" - 1/32"

1/32" - 1/16"

1/16" - 1/8"

1/8" - 1/4"

1/4" - 1/2"

1/2" - 1"

Bloom Time:

Mid

Mid/Late

Flower Shape:

Unknown - Tell us

Flower Fragrance:

No fragrance

Does it set seed?:

Yes; seed is viable

Bloom Color:

Pale Lavender

Regional

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

Dacula, Georgia

Machesney Park, Illinois

Reading, Massachusetts

Belfield, North Dakota

Glouster, Ohio

Marion, Wisconsin

show all

Gardeners' Notes:

1
positive
2
neutrals
0
negatives
RatingContent
Positive

On Jul 27, 2007, sandy4 from Reading, MA wrote:

I have been growing Knockout for about six years. I have many divisions made from my original plant. They grow very quickly, have tons of blooms and they don't wilt in the sun like some hostas during a dry spell. They also produce tons of seeds. They are not bothered by slugs even when young. I have mine growing in deep shade and moderate sun and they do well in both environments.

Neutral

On Jan 30, 2005, lmelling from Ithaca, NY (Zone 5b) wrote:

Zilis claims this cultivar is afflicted with marginal tearing, perhaps even worse than 'Brim Cup'.

Neutral

On Jan 28, 2005, jody from MD &, VA (Zone 7b) wrote:

Flower scapes 12". Aden 1986.