Botanical Name: Asclepias tuberosa
Native: Apocynaceae (formerly Asclepiadaceae) Dogbane family, includes butterfly flower and true vinca.
Hardiness: Perennial in USDA zones 3 and warmer
Plant Dimensions: 18″–24″ tall
Variety Information: Individual flowers ½”, borne in brilliant yellow clusters.
Exposure: Full sun
Bloom Period: Summer
Attributes: Attracts Pollinators, Cut Flower, Deer Resistant, Drought Tolerant, Good for Containers
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″