Family: Caprifoliaceae
Genus: Viburnum (vy-BUR-num) (Info)
Species: sieboldii (see-BOLD-ee-eye) (Info)
Cultivar: Ironclad
Additional cultivar information: (Ironclad™, 'KLMfour)
Hybridized by Roy 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:
Unknown - Tell us
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
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