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Helianthus, Mountain Sunflower, Narrow-Leaved Sunflower, Swamp Sunflower 'Mellow Yellow'

Helianthusangustifolius

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Family
Asteraceae (ass-ter-AY-see-ee)
Info
Genus
Helianthus (hee-lee-AN-thus)
Info
Species
angustifolius (an-gus-tee-FOH-lee-us)
Info
Synonym
Sun Exposure
Full Sun
Foliage
Herbaceous
This plant is resistant to deer
Height
6-8 ft. (1.8-2.4 m)
Spacing
9-12 in. (22-30 cm)
Hardiness
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
Danger

Unknown - Tell us

Bloom Color
Bright Yellow
Bloom Time
Mid Fall
Late Fall/Early Winter
Other Details
Category
Perennials
Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens
Foliage Color

Unknown - Tell us

Where to Grow

Unknown - Tell us

Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size

Unknown - Tell us

Other details
May be a noxious weed or invasive
Soil pH requirements

Unknown - Tell us

Patent Information

Unknown - Tell us

Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Heber Springs, Arkansas

Plain Dealing, Louisiana

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