Asclepias (Butterfly Weed) - Key Growing Information
DAYS TO GERMINATION: 14-21 days at 65-70°F (18-21°C). Stratification for Pleurisy Root only: Moisten,cover with plastic, and refrigerate at 40-50°F (4-10°C) for 7-14 days. After stratification, seeds should be brought into warmer temperatures to germinate.
SOWING: Transplant (recommended) - Sow 7-9 weeks before last frost. Sow 1/4" deep into a seed starting mix. Begins taproot growth upon germination. Do not allow to become pot bound at any time as plants will deteriorate rapidly. Transplant into larger cell packs or 3-4" pots 3-5 weeks after sowing. Harden off and transplant outdoors after the last frost. Direct seed - Can be direct sown in the fall or spring.
LIGHT PREFERENCE: Sun.
PLANT HEIGHT: Varies.
PLANT SPACING: 12-24".
HARDINESS ZONES: Varies.
HARVEST: 1/2 to 2/3 of flowers are open. If stems wilt after harvest, rehydrate in water for 24 hours. CAUTION: Milky sap may cause eye and skin irritation.
SOIL: Well-drained, sandy loam to poor soil.
USES: Cut flower. Borders, containers, and butterfly gardens.
SCIENTIFIC NAME: Asclepias spp.