How to Grow Black-Eyed Susan
Perennial
Black-Eyed Susan (Rudbeckia) is a cheerful North American native prized for its golden-yellow petals surrounding a dark brown center cone. US gardeners grow it because it is tough, drought-tolerant, and long-blooming, bringing dependable summer color to sunny beds with very little fuss. It is a favorite of pollinators and thrives across a wide range of climates.
Planting
Plant Black-Eyed Susan in full sun, at least six hours a day, in average, well-drained soil; it tolerates poor and clay soils but dislikes soggy ground. Set nursery transplants out in spring after the last frost, spacing them about 18 to 24 inches apart to allow good air movement. To grow from seed, sow directly in the garden in late spring once the soil has warmed, or start seeds indoors six to eight weeks before your last frost date. Some types benefit from a period of cold, moist conditions before they sprout, so fall sowing outdoors also works well.
Care
Water regularly during the first season to help roots establish, then only during extended dry spells since established plants are quite drought-tolerant. These flowers grow well in average soil and rarely need much feeding; a thin layer of compost worked in at planting is usually plenty. Deadhead spent blooms through summer to encourage more flowers, and leave some seed heads standing into fall and winter to feed birds and provide interest. Most varieties stand upright on their own, but tall clumps in rich soil may need light staking, and you can cut plants back after they finish for the season.
Bloom time
Black-Eyed Susan typically blooms from early or midsummer into fall, often lasting six to eight weeks or longer with regular deadheading.
Garden uses
It works beautifully in borders, cottage gardens, meadow plantings, and containers, and its sturdy stems make excellent cut flowers. The nectar-rich blooms draw bees, butterflies, and other pollinators, while the seed heads attract seed-eating birds like goldfinches.
Tips
Divide clumps every three to four years in spring or fall to keep plants vigorous and prevent overcrowding. Good air circulation and avoiding overhead watering help keep the foliage healthy through humid summers. Many gardeners let a few plants self-sow, since Black-Eyed Susan reseeds readily and will fill in bare spots on its own.
General guidance for US gardens. Timing and hardiness vary by region; check your local frost dates and hardiness zone. Page updated Aug 4, 2026.