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Rudbeckia grandiflora (Tall Coneflower)

Rough Coneflower, Tall Coneflower, Largeflower Coneflower

Rudbeckia grandiflora, Rough Coneflower, Tall Coneflower, Largeflower Coneflower, Yellow Flowers

Tough and easy to grow, Rudbeckia grandiflora (Tall Coneflower) is an upright rhizomatous perennial boasting a profusion of large, bright golden-yellow flowers, 3-4 in. wide (7-10 cm), from mid-spring to late summer. One mature plant can produce 80 or more flowering stems, providing a great floral show. Each blossom features 8-12 drooping yellow rays surrounding a prominent brownish-purple center cone. They are borne atop strong stems that do not need staking. Rich in nectar and pollen, the showy blossoms attract honey bees, butterflies, and pollinating insects. The basal leaves, 6 in. long (15 cm), have long petioles, while the shorter upper stem leaves are stalkless. Leaves and stems are hairy. Long-lived, Tall Coneflower is fairly adaptable, tolerating the moist to wet settings of acid bogs as well as short periods of drought once well-established. Vigorous, Tall Coneflower spreads rampantly by underground rhizomes and is appropriate for large landscapes. It is an excellent addition to naturalized areas, wildflower meadows, prairies, cottage gardens, and native plant gardens. It also makes perfect cut flowers!

  • Grows up to 2-5 ft. tall (60-150 cm) and 2-3 ft. wide (60-90 cm). Will naturalize to form large colonies
  • Performs best in full sun in average, moist, well-drained soils. Tolerates hot and humid summers, drought and a wide range of soils.
  • Great for wildflower gardenscottage gardens or in prairies and meadows.
  • Deadheading old flowers will encourage re-blooming.
  • No serious pest or disease issues. Keep an eye out for powdery mildew and leaf spot. Deer and rabbit resistant.
  • Native to North America.

Black-Eyed Susan: Plant Care and Growing Guide


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Requirements

Hardiness 5 - 8
Plant Type Perennials
Plant Family Compositae
Genus Rudbeckia
Common names Coneflower
Exposure Full Sun
Season of Interest Spring (Mid, Late)
Summer (Early, Mid, Late)
Height 2' - 5'
(60cm - 150cm)
Spread 2' - 3'
(60cm - 90cm)
Spacing 36" (90cm)
Maintenance Low
Water Needs Average
Soil Type Clay, Loam
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Showy
Native Plants United States, Southeast, Southwest, Midwest, Missouri, Illinois, Kansas, Ohio, Kentucky, Mississippi, Louisiana, Arkansas, Georgia, Texas, Oklahoma
Tolerance Drought, Deer, Rabbit, Rocky Soil, Clay Soil
Attracts Bees, Birds, Butterflies
Garden Styles Prairie and Meadow, Informal and Cottage
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Alternative Plants to Consider

Rudbeckia hirta ‘Goldilocks’ (Black-Eyed Susan)
Rudbeckia hirta ‘Irish Eyes’ (Black-Eyed Susan)
Rudbeckia triloba ‘Blackjack Gold’ (Brown-Eyed Susan)
Rudbeckia fulgida ‘American Gold Rush’ (Black-Eyed Susan)
Rudbeckia maxima (Giant Coneflower)
Rudbeckia hirta ‘Amarillo Gold’ (Black-Eyed Susan)

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Rudbeckia hirta (Black-Eyed Susan)
Rudbeckia fulgida (Black-Eyed Susan)
Black-Eyed Susan: Plant Care and Growing Guide
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 5 - 8
Plant Type Perennials
Plant Family Compositae
Genus Rudbeckia
Common names Coneflower
Exposure Full Sun
Season of Interest Spring (Mid, Late)
Summer (Early, Mid, Late)
Height 2' - 5'
(60cm - 150cm)
Spread 2' - 3'
(60cm - 90cm)
Spacing 36" (90cm)
Maintenance Low
Water Needs Average
Soil Type Clay, Loam
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Showy
Native Plants United States, Southeast, Southwest, Midwest, Missouri, Illinois, Kansas, Ohio, Kentucky, Mississippi, Louisiana, Arkansas, Georgia, Texas, Oklahoma
Tolerance Drought, Deer, Rabbit, Rocky Soil, Clay Soil
Attracts Bees, Birds, Butterflies
Garden Styles Prairie and Meadow, Informal and Cottage
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Rudbeckia
Guides with
Rudbeckia
Not sure which Rudbeckia to pick?
Compare Now

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