Black-Eyed SusanCommon Name: Black-Eyed Susan Scientific Name: Rudbeckia hirta USDA Hardiness Zones: 3 to 10, biennial/short-lived perennial Approximate number of seeds per gram (ounce) : 3,100 (90,000) Sun: full sun or partial shade Water: keep soil moist during germination, once established, drought tolerant Soil: lightly cover with about 1/16 inch of well-drained soil Temperature: 20 to 22 degrees Celsius (68 to 72 degrees Fahrenheit) Spacing: 2 pounds per acre for a meadow, 12 inches apart in beds Germination Time: one to four weeks The Black-Eyed Susan makes a colorful, long-lasting cut flower. Seeds sown in the spring will usually bloom in the second season. Once flowering, black-eyed susans are prolific bloomers. Deadhead regularly to avoid self-seeding.
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