Asteraceae
Helianthus nuttallii subsp. rydbergii
Helianthus nuttallii subsp. rydbergii
Also known as Helianthus nitidus var. trifoliatus, Helianthus apricus var. camporum, Helianthus apricus, Helianthus nuttallii var. rydbergii
Flowering Plants · Native Plants · Sunflower · Native Perennial · Prairie · Great Plains · Pollinator · Yellow Flowers · Wildflower · Asteraceae · Meadow · Birds
Rydberg's sunflower is a native perennial subspecies adapted to prairies and moist meadows of the northern Great Plains and Canadian provinces. It performs best with regular moisture and full to partial sun, producing cheerful yellow daisy-like blooms that attract pollinators and seed-eating birds. Allow it space to spread naturally or use dividing every few years to manage its rhizomatous growth habit.
Growing conditions
The details behind the basics
- Daily light
- 5 hours
- Watering
- Water deeply to keep soil consistently moist, especially during dry spells, allowing the top inch to dry slightly between wateri · Every 7-10 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 5.9–7.5
- Temperature
- -10°F to 85°F
- Cycle
- Perennial
Hardiness
USDA 5a-9b
Form & growth
Mature size and habit
- Mature height
- 18 in – 3 ft
- Spread
- 2 ft
- Spacing
- 24 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- Alberta, Colorado, Iowa, Manitoba, Minnesota, Montana, Nebraska, North Dakota, Ontario, QuéBec, Saskatchewan, South Dakota
- Attracts
- Bees, Butterflies, Birds
Sources: trefle, usda
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