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

Helianthus nuttallii (Nuttal’s sunflower) map.png

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

USDA PLANTS Profile

Burke Museum of Natural History and Culture

Consortium of Pacific Northwest Herbaria