Botanical Name: Asclepias tuberosa
Native: Eastern U.S., Canada, and Northern Mexico
Hardiness: Perennial in USDA zones 3 and warmer
Plant Dimensions: 24"–36" tall
Variety Information: Individual flowers ½", borne in brilliant red-orange clusters.
Exposure: Full sun
Bloom Period: Summer
Attributes: Attracts Pollinators, Drought Tolerant, Deer Resistant
When to Sow Outside: 2 to 4 weeks before your average last frost date, or fall for spring germination.
When to Start Inside: 6 to 8 weeks before your average last frost date.
Days to Emerge: 14–28 days
Seed Depth: ¼"
Seed Spacing: A group of 3 seeds every 12"–24"
Thinning: When 3" tall, thin to 1 every 12"–24"
Harvesting: For longest vase life, harvest flowers in the morning, choosing blooms that are 1/2-2/3 open. Place in water, allowing the latex within the stems to dissipate in the water, then change the water. Wear gloves; milkweed sap can cause skin and eye irritation and can be toxic if ingested.
Milkweed/Butterfly Flower Seeds Reviews