'The Rocket' is an imposing, clump-forming perennial with a mounded habit which is grown both for its foliage and for its spectacular flower spires. Large, coarsely-toothed, triangularly heart-shaped, light green leaves form a foliage mound that is attractive even when the flowers are not in bloom. Small, bright, lemon yellow, daisy-like flowers appear in dense racemes in mid-summer atop thick, purplish, alternately-leafed flower spikes towering above the foliage to 4' tall.
- Type: Perennial
- Zone: 4 to 8
- Height: 3.00 to 5.00 feet
- Spread: 2.00 to 4.00 feet
- Bloom Time: June to July
- Bloom Description: Lemon yellow
- Sun: Part shade to full shade
- Water: Medium to wet
- Maintenance: Medium
- Suggested Use: Rain Garden
- Flower: Showy
- Tolerate: Heavy Shade, Wet Soil