Common Milkweed is drought-tolerant once established, requiring minimal watering. During prolonged dry spells, especially in its first year, provide supplemental water to ensure healthy growth.

Overwatering should be avoided as it can lead to root rot. Aim for consistently moist but not waterlogged soil.

Pruning is not strictly necessary but can be done to manage size or encourage bushier growth. Cut back stems in late fall or early spring to about 15 cm from the ground.

Deadheading spent flowers can prevent self-seeding, though allowing seed pods to mature provides winter interest and food for wildlife.

Common Milkweed is easily propagated by seed or by division of its rhizomatous root system. Seeds require a cold stratification period before germination.

Sow seeds directly outdoors in late fall or early spring, or start indoors after stratification. Root divisions can be taken in spring or fall.

Repotting is generally not applicable as Common Milkweed is typically grown outdoors in the ground. If grown in a large container, it may need repotting every 2-3 years to refresh the soil and manage root growth, moving to a slightly larger pot if necessary.