Iron Butterfly Narrowleaf Ironweed Redbud then moderate drought tolerance with

then moderate drought tolerance with occasional deep watering

a fast-draining mix

Bloom typically starts in late spring into early summer and can continue through summer with deadheading

it opens with clean white flowers

adding consistent color without overwhelming nearby plants

Iron Butterfly Narrowleaf Ironweed Redbud then moderate drought tolerance withIron Butterfly Narrowleaf Ironweed (Vernonia lettermannii 'Iron Butterfly') Iron Butterfly Narrowleaf Ironweed brings late season purple color and a clean, fine textured look that makes mixed borders feel more designed. The airy foliage reads soft and light from a distance, but the plant holds a strong, upright presence that keeps plantings from looking flat. When it blooms, the rich purple flowers draw butterflies and other pollinators in steady