Helianthus nuttallii subsp. rydbergii
Helianthus nuttallii subsp. rydbergii
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.
Care Level
Low
Sun
Partial Shade
Water
Moderate
Growth Rate
Moderate
Mature Height
18″ – 36″
Soil
loam
Life Cycle
Perennial
Spacing
24″
Watering Schedule
Every 7-10 Days • Water Deeply To Keep Soil Consistently Moist, Especially During Dry Spells, Allowing The Top Inch To Dry Slightly Between Wateri
Soil pH
5.9 – 7.5
Temperature
-10° – 85°F
Mature Spread
up to 24″
Root Depth
Medium
Foliage
Coarse
Native to
Attracts
Sources
Data: trefle, usda
No nurseries currently have this species in stock.