Ironweed (Vernonia fasciculata)

Ironweed (Vernonia fasciculata)

Ironweed is a favorite nectar source of Monarchs and other butterflies. It paints the garden with large brush strokes of purple flowers. When planted next to Marsh Milkweed, expect a constant supply of monarchs in late summer. Great for rain gardens and large gardens with moist soil.


Sun:    Full Sun, Part Shade
Moisture:    Medium, Medium-Wet
Height:    6 feet
Blooms:    July, Aug, Sept
Color:    Purple
Spacing:    2-3′
Zones:    3-9
Benefits:    Butterflies, Pollinators, Deer Resistant

Design Tips

Ironweed is a tall, strong flower that is best planted in small groups or scattered individually in the middle or back of rain gardens or shoreline restorations. Expect to see a lot of monarch butterflies feeding on the nectar when planted near Marsh Milkweed, a host for monarch caterpillars.

Companion Plants

Marsh Milkweed
New England Aster
Orange Coneflower