General Culture:
Easily grown in average, medium, well-drained soil in full sun. Taller plants may need staking. Prune back in early spring to reduce height and minimize tendency toward floppiness (optional). Spreads in the garden, but is less aggressive than the species. Divide every 2-3 years to control growth.
Noteworthy Characteristics:
This obedient plant cultivar is an erect, clump-forming but rhizomatous perennial which typically grows 2-3' tall on stiff, square stems and features dense spikes of pure white, tubular, two-lipped, snapdragon-like flowers which bloom throughout the summer. Blooms from bottom to top on each spike. Narrow, lance-shaped, sharp-toothed leaves (to 4" long). Genus members are commonly called obedient plants because each individual flower will, upon being pushed in any one direction, temporarily remain in the new position as if it were hinged. Sometimes also commonly called false dragonhead because the flowers are suggestive of those of dragonhead (Dracocephalum).
Problems:
No serious disease or insect problems. Rust is an occasional problem. Can be an aggressive spreader and tends to flop.
Uses:
Provides color and contrast to the perennial border. An excellent plant for naturalizing in a wild garden, prairie or meadow. Valued for its late season bloom.
© Missouri Botanical
Garden, 2001-2010
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