Photo courtesy of Spotswood Greenery
Photo courtesy of Spotswood Greenery
Rudbeckia triloba
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Hundreds of small yellow daisies with near-black centers cover this plant from late summer into fall, on a branching frame that reaches 36 to 42 inches. Rudbeckia triloba is a native perennial spreading 24 to 30 inches wide in full sun, hardy from Zone 4 through Zone 8.
The flowers are smaller than a black eyed Susan's but there are many more of them, which gives the whole plant an airy, scattered look rather than a solid block of yellow. Bloom starts in July and often runs to frost.
This is a short-lived perennial, usually two or three years, and it keeps itself going by self-sowing. In a naturalized planting or a meadow that works in your favor. In a tidy bed you will be pulling seedlings.
Bees and butterflies come to the flowers through the bloom, and goldfinches take the seed through winter if you leave the stems standing. It tolerates drought, clay, and poor soil once established, and takes part shade better than most rudbeckias.
Height 36"- 42" Spread 24"- 30"
USDA Hardiness Zones 4-8
Lowest Temperatures -30°F to -20°F
Full sun - more than 6 hours of direct sun per day
AL, AR, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, MI, MN, MO, MS, NC, NE, NJ, NY, OH, OK, PA, SC, TN, TX, VA, VT, WI, WV
