- Species and varieties: Asclepias syriaca, commonly known as common milkweed, is a species of flowering plant in the dogbane family, Apocynaceae. It is native to North America and is known for its role in supporting monarch butterflies. There are no significant varieties of Asclepias syriaca, but it is part of a larger genus that includes other milkweed species.
- Hybrid or heirloom: Asclepias syriaca is considered an heirloom plant. It is not typically hybridized and is grown in its natural form, preserving its traditional characteristics and ecological benefits.
- Pruning and training: Pruning is not typically necessary for Asclepias syriaca. However, deadheading spent flowers can encourage additional blooms and prevent unwanted self-seeding. If the plant becomes too tall or leggy, it can be cut back to promote bushier growth.
- Fertilization needs: Asclepias syriaca generally does not require fertilization. It can thrive in poor soils and excessive fertilization can lead to weak, leggy growth. If desired, a light application of a balanced, slow-release fertilizer in early spring can support growth.
- Hardiness zones: Asclepias syriaca is suitable for USDA hardiness zones 3 through 9. It can tolerate a wide range of temperatures and is hardy in both cold and warm climates.
- Climate requirements: Common milkweed thrives in full sun and well-drained soil. It is drought-tolerant once established and can grow in a variety of soil types, including sandy, loamy, and clay soils. It prefers a pH range of 4.8 to 6.8.