Helianthus nuttallii (Nuttal’s sunflower)
Tall, rhizomatous and tuberous native perennial with upright yellow flowers, blooming July to September. Common on moist to saturated soils of meadows and sloughs, forming large clumps; up to 9,000 ft. elevation. Occasionally on dry soils which experience seasonal flooding.
DISTRIBUTION / ADAPTATION
INFORMATION & ATTRIBUTES
Family: Asteraceae
Duration: Perennial
Growth Habit: Forb/herb
Native Status: Native
Growth Form: Rhizomatous
Mature Height: 10 ft..
Bloom Color: Yellow
Bloom Period: Summer
Annual Precipitation: 12 in.
Drought Tolerance: Low
Shade Tolerance: Intolerant
Elevation:
Wetland Indicator Status: FACW
Fire Resistance: No
Fire Tolerance:
Nitrogen fixation:
SOIL ADAPTATION
Coarse Texture: No
Medium Texture: Yes
Fine Texture: Yes
Salinity Tolerance: None
CaCO3 Tolerance: Low
pH Range: 5.9-7.5
SEEDING NOTES
Seeds per Pound:
Seeding Rate: PLS lbs/acre
Season:
Days to Germination:
VARIETIES & LOCAL ACCESSIONS
None
ADDITIONAL LINKS
Burke Museum of Natural History and Culture