Green-Headed Coneflower, Rudbeckia laciniata

Green-Headed Coneflower

Rudbeckia laciniata

Benefits:
Sun Shade:
Bloom Time: Fall
Zones: 4, 5
Soil Conditions: Clay, Loam, Sand
Soil Moisture: Moist, Wet
Color: Yellow
Fragrance: No
Height: 5 - 8 feet
Spacing: 1 foot


Description

Green-Headed Coneflower (Rudbeckia laciniata), Cutleaf Coneflower or Tall Coneflower occurs in moist soils in rich woodlands, thickets or along streams, sloughs or other bodies of water. Well-named since it may grow to 9 feet tall in the wild, but typically grows 3-4 feet tall in cultivation. Features daisy-like flowers (to 3.5 inches across) with reflexed (drooping), yellow rays and dome-like, green center disks. Pinnate, deeply-lobed (3-5 parted), light green leaves.

The blooming period occurs from mid-summer to early fall and lasts about 1-2 months. Each disk floret is replaced by an oblongoid achene (3-4.5 mm. in length) that has a crown of tiny blunt teeth at its apex. The root system is fibrous and rhizomatous. Clonal colonies of plants are often formed from the long rhizomes.

Habitats include open bottomland forests, moist meadows in wooded areas, woodland borders, moist thickets, sloughs in partially shaded areas, low areas along rivers, partially shaded river banks, calcareous seeps, margins of poorly drained fields, and pastures. Occasionally, this species is grown in flower gardens. It prefers partially shaded areas that are poorly drained and may be prone to occasional flooding during the spring.

Easily grown in average, medium, well-drained soil in full sun to part shade. Tolerates hot and humid summers. Can spread aggressively by underground stems, which may be a concern if grown in the border. Divide clumps to control growth. Remove spent blooms to encourage a fall re-bloom.

Plant Notes and Herbal Uses
  Taller plants may need support.
  It may spread aggressively by means of its rhizomes.
  At a site that is too sunny and dry, the leaves may droop excessively.
  Remove spent blooms to encourage a fall re-bloom.
Further Information

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