Plant library · Perennial Flowers
Asclepias tuberosa
Butterfly Weed brings bright orange flowers to sunny perennial beds from early through mid summer. At about 2 feet tall and 1½ feet wide, it makes a compact middle layer rather than a backdrop. Use it where its clear color and pollinator-friendly flowers can be seen from a path, patio, or seating area, while keeping the planting in a dry-leaning part of the garden.
Give Asclepias tuberosa an open, full-sun position in a border, native planting, or meadow-style bed. Keep it out of low spots and away from areas that stay wet after rain; well-drained, dry soil suits its long-lived root system. Place it in a settled section of the plan rather than an area likely to be dug, divided, or rearranged, since established plants are difficult to transplant.[1][2]
Set plants 18 inches apart, center to center, for a continuous small-scale drift. Each plant can fill roughly 1½ feet across at maturity, so this spacing allows neighboring crowns to meet without assigning extra width that crowds the bed. In a mixed border, reserve the front edge for lower plants and leave a reach-in line from a path or bed edge for seasonal cleanup.
Full sun and excellent drainage are the essential site conditions. Use Butterfly Weed in the drier shoulder of a bed, on a berm, or in a coarse, freely draining planting area instead of beside moisture-demanding perennials or downspouts. Its low-water needs make it a better fit for a restrained irrigation zone than for regularly saturated ground.
Expect shoots to appear late in spring, leaving a temporary opening in the bed before the plant fills out. Mark its location or surround it with low, later-emerging neighbors so early-season weeding and planting do not disturb the crown. Orange flower clusters arrive in summer, followed by seed pods in early fall; the stems die back for winter.[2][3]
Build the layout around its eventual location rather than treating it as a movable gap-filler. The taproot makes division and transplanting difficult, so leave enough room for its 1½-foot mature spread from the outset. Avoid placing it where a future path widening, edging project, or frequent bed renovation would force relocation.[1][3]
Editorial content updated 2026-07-20.