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PlantFiles: Hosta
Hosta 'Knockout'

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Family: Liliaceae (lil-ee-AY-see-ee) (Info)
Genus: Hosta (HOSS-tuh) (Info)
Cultivar: Knockout
Hybridized by Aden; Year of Registration or Introduction: 1986

» View all varieties of Hostas

One vendor has this plant for sale.

3 members have or want this plant for trade.

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

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to view:

By sandy4
Thumbnail #1 of Hosta  by sandy4

By Joan
Thumbnail #2 of Hosta  by Joan

By Joan
Thumbnail #3 of Hosta  by Joan

By sarajute
Thumbnail #4 of Hosta  by sarajute

Profile:

1 positive
2 neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive sandy4 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 lmelling 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 jody On Jan 28, 2005, jody from MD &, VA (Zone 7b) wrote:

Flower scapes 12". Aden 1986.

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



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