Space plants 18 to 24 in. Hardiness depends on the variety. This plant blooms most heavily from mid- to late summer, but will continue sporadically until frost. Use it as an accent plant or combine with other robust perennials like yellow coneflower. Space plants 3 ft.
Flowers can be gold, white, pink and red, and bloom from summer into fall.
Cultivated varieties and hybrids of the species millefolium are popular for their casual, lacy appearance. These floppy plants, which can become invasive, reach 3 ft. tall. Established clumps tolerate considerable drought. Space 12 to 24 in. Hardiness varies with species.