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PlantFiles: Siebold Viburnum
Viburnum sieboldii 'Ironclad'

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Family: Adoxaceae (a-dox-AY-see-ee) (Info)
Genus: Viburnum (vy-BUR-num) (Info)
Species: sieboldii (see-BOLD-ee-eye) (Info)
Cultivar: Ironclad
Additional cultivar information: (aka Ironclad, KLMfour)
Hybridized by Klehm; Year of Registration or Introduction: 1998

Category:
Shrubs
Trees

Height:
15-20 ft. (4.7-6 m)
20-30 ft. (6-9 m)

Spacing:
15-20 ft. (4.7-6 m)
20-30 ft. (6-9 m)

Hardiness:
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)

Sun Exposure:
Full Sun
Sun to Partial Shade
Light Shade

Danger:
N/A

Bloom Color:
White/Near White

Bloom Time:
Late Spring/Early Summer

Foliage:
Grown for foliage
Deciduous
Aromatic
Smooth-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Non-patented

Propagation Methods:
From softwood cuttings
From semi-hardwood cuttings

Seed Collecting:
Remove fleshy coating on seeds before storing
Properly cleaned, seed can be successfully stored
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Click thumbnail
to view:

By ViburnumValley
Thumbnail #1 of Viburnum sieboldii by ViburnumValley

No details have been posted.

Regional...

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

Poplar Grove, Illinois
Clermont, Kentucky
Georgetown, Kentucky
Louisville, Kentucky
Madison, Wisconsin



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