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Category
Herbs
Shrubs
Trees
Water Requirements
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Sun Exposure
Sun to Partial Shade
Foliage
Grown for foliage
Deciduous
Foliage Color
Height
15-20 ft. (4.7-6 m)
20-30 ft. (6-9 m)
Spacing
6-8 ft. (1.8-2.4 m)
15-20 ft. (4.7-6 m)
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)
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Where to Grow
Danger
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Green
Inconspicuous/none
Bloom Characteristics
Bloom Size
Bloom Time
Mid Spring
Other details
Soil pH requirements
5.1 to 5.5 (strongly acidic)
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
By dividing the rootball
From softwood cuttings
From semi-hardwood cuttings
From seed; direct sow outdoors in fall
From seed; stratify if sowing indoors
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
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