Source: Buckeye Yard and Garden OnLine newsletter.
Blanketflower is a great plant for hot, tough locations and is beginning to bloom in central Ohio. The large daisy-like flowers are often a combination of hot colors (red, yellow) and appear in early June and last for around 3 weeks. These plants tolerate hot dry soils and tend to be short-lived in moist, fertile soils. Heights are anywhere from 8-24″ and widths are 12-24″ depending upon the cultivar. Plant them in masses or groups in borders in full sun; they also tolerate light-shade. Common cultivars include ‘Dazzler’ (bright orange flowers with yellow tips, 24-30″ tall), ‘Goblin’ (red flowers with yellow tips, 12-15″ tall), and ‘Baby Cole’ (maroon flowers with yellow tips, 8-10″ tall). Plants should be deadheaded (dead flowers removed) as needed to prolong blooming. Divide plants every 2-3 years for best growth.
