Vernonia lettermanii 'Iron Butterfly' ~ Iron Butterfly Ironweed gardener's-confidence-collection Black Adder Giant Hyssop is

Black Adder Giant Hyssop is also drought-tolerant once established

2019 photo

well-drained soil but is drought tolerant once established

CBG Fruit Veg Island

Vernonia lettermanii 'Iron Butterfly' ~ Iron Butterfly Ironweed gardener's-confidence-collection Black Adder Giant Hyssop isIron Butterfly Ironweed is a compact coarse herbaceous perennial with rough serrated bright green lance like foliage on stiff upright stems. Loose terminal clusters of fluffy bright violet flowers bloom in summer before giving way to rusty seed clusters. Grows best in full sun and average to dry well drained soils. Type: Perennial Origins: Arkansas and Oklahoma Height: 2' 3' Spread: 2 3' Spacing: 2. 5' USDA Hardiness Zone: 4 9 Culture: Full Sun Bloom