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This widespread native has many large clusters of rose-purple flowers on a tall stalk. Forty-two species of butterflies are attracted to this interesting plant which spreads by underground stems. Well-drained soil.
Family: Asclepiadaceae (ass-kle-pee-ad-AY-see-ee)
Genus: Asclepias (ass-KLE-pee-us)
Species: syriaca (seer-ee-AK-uh)
Category:
Perennials
Height:
4-6 ft. (1.2-1.8 m)
Spacing:
36-48 in. (90-120 cm)
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)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Sun Exposure:
Full Sun
Sun to Partial Shade
Danger:
All parts of plant are poisonous if ingested
Bloom Color:
Rose/Mauve
Bloom Time:
Mid Summer
Foliage:
Herbaceous
Other details:
May be a invasive
This plant is attractive to bees, butterflies and/or birds
Self-sows freely; deadhead if you do not want volunteer seedlings next season
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)
Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored
This item can ship 1st Class Mail!
