Heliopsis helianthoides - False sunflower
Works well in heavy soils and is a great upright plant in a tall border.
Heliopsis helianthoides is an upright, clump-forming sunflower-like perennial with daisy-like flowers. Heliopsis is sometimes commonly called false sunflower.
Height: 3-6 ft
Sun: Full Sun
Water: Dry to Medium
Bloom color: Yellow
Bloom time: June to August