Source: David J Stang
Rudbeckia speciosa wenderoth
Showy Coneflower
Rudbeckie voyante
No seeds available for this plant.
We are not accepting seeds for this plant at the moment.
Bloom Colour: Yellow
Bloom Period: Aug - Oct
Max Height: 2.0 feet
Max Width: 2.0 feet (spreads by rhizome)
Light Condition:
More than 6 hours of direct sun a day
More than 2 or 3 hours but less than 6 hours of direct sun a day
Soil conditions:
Tolerates dry soil condition
Tolerates medium soil condition
More than 6 hours of direct sun a day
More than 2 or 3 hours but less than 6 hours of direct sun a day
Tolerates dry soil condition
Tolerates medium soil condition
Lifespan:
Perennial
plants that will that come back year after year
Gardener Experience:
Does not spread uncontrollably
Easy to germinate
Self-seeding
Does not spread uncontrollably
Easy to germinate
Self-seeding
Landscape Uses:
Suitable for container garden
Suitable for school gardens
Suitable for container garden
Suitable for school gardens
Ecological Benefits:
Supports pollinators
Bee host
Supports pollinators
Bee host
Tolerates:
Tolerates juglone conditions
Tolerates transplantation
Tolerates juglone conditions
Tolerates transplantation
Special Features and Considerations:
Plant Location
Distribution according to VASCAN
Ephemeral
Native
Introduced
Excluded
Extirpated
Doubtful
Absent
Canadensis
Thrives in Ecozones
- Boreal Plains
Ecological Benefits
Butterflies Supported by Rudbeckia speciosa wenderoth
No butterfly data available for this plant.
Specialized Bees Supported by Rudbeckia speciosa wenderoth
- Andrena aliciae
- Andrena rudbeckiae
- Complexe Colletes americanus
- Complexe Colletes compactus
- Megachile inimica
- Megachile pugnata
- Melissodes agilis
- Melissodes illatus
- Melissodes subillatus
- Melissodes trinodis
- Protandrena andrenoides
Plants that grow in similar conditions, that bloom at the same time.
Complementary Plants
- No complementary plants found.
Substitute For Non-Native Plants
No substitute plant data available for this plant.
Sowing Information
Download Seed Envelope Labels (PDF)
- Sowing depth: Surface sow
- Sow by March
- Stratification duration: 30 days
- Self-seeding
Harvesting and Seed Sharing
- Harvest start month: September
- Harvesting indicator:
- Seeds are dark and dry, and 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: No, you can donate without knowing the source as there are only straight species
- No harvesting video available at this time.
Toxicity Notes
Inadequate information on toxicity found however other Rudbeckia are toxic and suspect this species to be toxic if ingested.