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An upright perennial with tiny, deep purple blooms borne on stiff stems over pointed, lance-shaped, green foliage.
• | Attracts Butterflies |
• | Lt. Sum-Fall |
• | Clumping |
• | Naturalizing |
The common name is derived from its "iron-like" qualities including tough stems, the rusty-tinged colour of fading flowers and the rusty-coloured seeds.
Plant in full sun, in a rich, moist, slightly acidic soil. Removing spent flowers will help prevent unwanted seeding.