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Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Foliage Color
Blue-Green
Height
12-18 in. (30-45 cm)
Spacing
15-18 in. (38-45 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)
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Where to Grow
Danger
Seed is poisonous if ingested
Parts of plant are poisonous if ingested
Bloom Color
Pale Yellow
Bright Yellow
Bloom Characteristics
Bloom Size
Bloom Time
Mid Spring
Late Spring/Early Summer
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
From leaf cuttings
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Seed Collecting
Bag seedheads to capture ripening seed
Collect seedhead/pod when flowers fade; allow to dry
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
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