Source: homeredwardprice
Helianthus strumosus
Plant Names
Helianthus strumosus
Pale-leaved Sunflower
Hélianthe scrofuleux
Plant Characteristics
Bloom Colour: Yellow
Bloom Period: Jul - Sep
Max Height: 6.0 feet
Max Width: 3.0 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 come back year after year
Gardener Experience:
Spreads by rhizome
Spreads by rhizome
Landscape Uses:
Suitable for woodland gardens
Suitable for woodland gardens
Ecological Benefits:
Supports birds
Butterfly host
Bee host
Keystone species
Supports birds
Butterfly host
Bee host
Keystone species
Tolerates:
Tolerates drought conditions
Rabbit resistant
Tolerates sandy conditions
Tolerates acidic soil conditions
Tolerates juglone conditions
Tolerates drought conditions
Rabbit resistant
Tolerates sandy conditions
Tolerates acidic soil conditions
Tolerates juglone conditions
Special Features and Considerations:
Seed and plant distribution status
No seeds available for this plant.
We currently accept seeds for this plant
Fun Facts
Pale-leaved Sunflower is a tall wildflower with yellow blooms. It can thrive in a diverse range of habitats.
Plant Location
Native to Ottawa region: Yes
Distribution according to VASCAN
Ephemeral
Native
Introduced
Excluded
Extirpated
Doubtful
Absent
Canadensis
Thrives in Ecozones
- Atlantic Maritime
- Boreal Shield
- Mixed Wood Plains
Ecological Benefits
Butterflies Supported by Helianthus strumosus
-
Chlorochlamys chloroleucaria
Blackberry looper - Arpenteuse des ronces -
Chlosyne gorgone
Gorgone checkerspot - Damier gorgone -
Chlosyne nycteis
Silvery checkerspot - Damier argenté -
Phragmatobia fuliginosa
Ruby Tiger - Écaille Cramoisie
Specialized Bees Supported by Helianthus strumosus
- Andrena aliciae
- Andrena helianthi
- Melissodes agilis
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
Harvesting and Seed Sharing
- Harvest start month: September
- Harvesting indicator:
- Seeds easily fall off when you gently pull them off
- Harvesting:
- Shake seed head in paper bag
- 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.