Toxic Plant Known to be toxic - Toxic to mammals if ingested.
Image of Rudbeckia laciniata
Source: GFDL
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Plant Names

image of Flowering plant
Rudbeckia laciniata
Cut-leaved Coneflower
Rudbeckie laciniée

Synonyms

green-headed coneflower
tall coneflower
rudbeckia lacinié

Plant Characteristics

Bloom Colour: Yellow Bloom Period: Jul - Sep
Max Height: 7.0 feet
Max Width: 4.0 feet (spreads by rhizome)
Light Condition:
Full sun More than 6 hours of direct sun a day
Part shade More than 2 or 3 hours but less than 6 hours of direct sun a day
Full shade Less than 2 or 3 hours of direct sun a day
Soil conditions:
Moisture medium Tolerates medium soil condition
Lifespan: Perennial plants that will come back year after year
Gardener Experience:
plant spread by rhizome Spreads by rhizome
plant germinate easy Easy to germinate
plant self seeding Self-seeding
Landscape Uses:
rain garden Suitable for rain gardens
shoreline_rehab Suitable for shoreline rehabilitation
container suitable Suitable for container garden
school garden Suitable for school gardens
woodland garden Suitable for woodland gardens
Ecological Benefits:
bee host Bee host
Tolerates:
Deer Resistant Deer resistant
Rabbit Resistant Rabbit resistant
Sand Tolerant Tolerates sandy conditions
Juglone Tolerant Tolerates juglone conditions
Transplantation Tolerant Tolerates transplantation
Special Features and Considerations:

Seed and plant distribution status

No seeds available for this plant.
We currently accept seeds for this plant

Fun Facts

Cut-leaved Coneflower can become an impressive plant in a garden. Its deeply divided leaves give it its common name.
Cut-leaved Coneflower is one of the larger native members of the sunflower family and can tower over many garden perennials.

The dried flower heads can remain attractive into winter, especially when left standing. This is a vigorous spreader. Give it plenty of room or plant it where its natural spreading habit is desirable.

Plant Location

Native to Ottawa region: Yes

Distribution according to VASCAN

Distribution: Rudbeckia laciniata
Ephemeral Native Introduced Excluded Extirpated Doubtful Absent

Thrives in Ecozones

  • Atlantic Maritime
  • Prairies
  • Boreal Shield
  • Mixed Wood Plains

Ecological Benefits

Butterflies Supported by Rudbeckia laciniata

Specialized Bees Supported by Rudbeckia laciniata

  • Andrena aliciae
  • Andrena rudbeckiae
  • Complexe Colletes americanus
  • Complexe Colletes compactus
  • Megachile inimica
  • Megachile pugnata
  • Melissodes agilis
  • Melissodes illatus
  • Melissodes subillatus
  • Melissodes trinodis
  • Protandrena andrenoides

Complementary Plants

Substitute For Non-Native Plants

  • Oenothera (Non-Native Primrose)
  • Oenothera biennis (Evening Primrose Cultivars)
  • NA (Black Eyed Susan's Cultivars)
  • Rudbeckia Triloba (Brown Eyed Susan's)
  • Echinacea (Coneflowers)
  • Leucanthemum (Shasta Daisy)
  • NA (Non-native False Sunflower)

Sowing Information

Download Seed Envelope Labels (PDF)
  • Sowing depth: Sow just below surface
  • Sow by March
  • Stratification duration: 30 days
  • Self-seeding

Harvesting and Seed Sharing

  • Harvest start month: September
  • Harvesting indicator:
    • Seeds easily fall off when you gently pull them off
  • Harvesting:
    • Cut top edge then shake seeds off in bag or container with rock or equivalent
  • Seed viability test:
    • No test needed before donating
  • Packaging measure: 1 rounded 1/8 teaspoon
  • Seed storage:
    • Air dry in paper bag or open container, for a few days until crisp
    • Shake seeds to move them once in a while to prevent molding
  • Cultivar: Yes, do not donate unless you know source, and there are no known cultivars in your garden or at proximity
  • Remove non-seed material
  • No harvesting video available at this time.

Toxicity Notes

Toxic to mammals if ingested.