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RUDBECKIA laciniata

Image of Rudbeckia laciniata

James H. Schutte

Family

Asteraceae

Botanical Name

RUDBECKIA laciniata

Plant Common Name

Cutleaf Coneflower, Tall Black-eyed Susan

General Description

Named for its deeply lobed green leaves, cutleaf coneflower is a tall perennial that becomes covered with green-eyed, yellow flowers from summer to fall. Natural populations can be found across a large expanse of North America, from British Columbia, Canada down to northern Florida. In the wild it favors moist, open woods, streamsides, moist thickets and roadsides. The plants form clumps that slowly spread by rhizomes.

The large, deeply lobed leaves line the upright stems of this large Rudbeckia. Its tall, smooth, green stems are strong and flexible. Flowering occurs from midsummer to early fall. The tall stems become topped with bright daisies with drooping petals and a rounded central disc that is gold and green. Butterflies and bees frequent the blossoms, and birds will pick the seeds from their dry seedheads in fall. Remove spent flowers to encourage a second flowering later in the season.

Plant cutleaf coneflower in full to partial sun and fertile soil with average drainage with good moisture. It is tolerate of summer heat and humidity. The tall plants may require staking, especially if planted in partial sun. This wildflower is best suited to informal garden settings. It tends to self-sow and may naturalize over time. There are lots of interesting double-flowered cultivars that are better suited to more formal garden settings including the shorter, less aggressive 'Goldquelle' and 'Hortensia' (syn. 'Golden Glow').

Characteristics

  • AHS Heat Zone

    9 - 1

  • USDA Hardiness Zone

    3 - 9

  • Sunset Zone

    1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Perennial

  • Sun Exposure

    Full Sun, Partial Sun, Partial Shade

  • Height

    3'-10' / 0.9m - 3.0m

  • Width

    1'-2' / 0.3m - 0.6m

  • Bloom Time

    Summer, Late Summer, Early Fall, Fall

  • Native To

    North America

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Average

  • Soil type

    Clay, Loam

  • Tolerances

    Wet Site

  • Growth Rate

    Fast

  • Water Requirements

    Average Water, Ample Water

  • Habit

    Clump-Forming

  • Seasonal Interest

    Summer, Fall

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Yellow, Yellow Green

  • Fruit Color

    Brown

  • Foliage Color (Spring)

    Green, Light Green

  • Foliage Color (Summer)

    Green, Light Green

  • Foliage Color (Fall)

    Yellow, Green

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    Yes

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    Yes

  • Foliage Texture

    Coarse

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Cutflower, Mixed Border, Wildflower

  • Sharp or Has Thorns

    No

  • Invasive

    Sometimes

  • Attracts

    Birds, Butterflies

  • Self-Sowing

    Yes