Protected Series:
Zone: 4IRON BUTTERFLY IRONWEED
Vernonia lettermanii 'Iron Butterfly' is a refined selection of the native ironweed, prized for its unique, thread-like, feathery foliage that distinguishes it from its coarser relatives. It forms a dense, compact, upright mound, typically reaching 2 to 3 feet in height, which resists the flopping habit commonly seen in other Vernonia species. In late summer and early autumn, it produces clusters of deep purple, tubular flowers that act as powerful magnets for late-season pollinators, including monarchs and native bees. The fine-textured leaves add structural interest to the garden throughout the growing season, even before the vibrant blooms arrive, creating a soft, airy aesthetic that blends seamlessly into meadow-style plantings or formal perennial borders.
To ensure the best performance, plant 'Iron Butterfly' in a location that receives full sun, as it requires at least 6 to 8 hours of direct light to maintain its sturdy form and produce a prolific floral display. It is highly adaptable to a wide range of soil conditions, including clay and moist sites, though it performs best in soil that is well-draining. Once established, it demonstrates impressive drought tolerance, making it an excellent choice for low-maintenance landscapes or rain gardens. It requires very little intervention, although cutting the plant back to the ground in late winter or early spring will tidy the garden and promote healthy, vigorous growth for the coming season.
| PLANT | SIZE | TYPE | GALENA | ADD'L | DIG | SOON |
| VERNONIA LET IRON BUTTERFLY | con 1 | 174 | 0 | 0 | 0 |
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To help this plant settle in and thrive, we recommend these standard planting practices: Plant in well-draining soil with full sun. Water regularly, but avoid overwatering. Deadhead spent blooms to encourage more flowering. Fertilize lightly in the spring and summer.
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