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Helianthus angustifolius

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Names

Common Names
Swamp Sunflower, Narrowleaf Sunflower

Growth

Height
5-6 feet
Spread
36-48 inches
Growth Rate
Medium to fast

Appearance

Bloom Color
Yellow to yellow-orange.
Foliage Color
Green
Fall Foliage Color
Bright yellow

Environment

Hardiness Zones
Zones 5-9
Sunlight Requirements
Ideally full Sun. Tolerates partial sun
Soil Type
Moist to wet, acidic, well-drained soils with textures ranging from sandy to clay loam.
Soil Drainage
Moist, well-drained soils
Soil pH
<7-7+ Acidic to neutral/slightly alkaline

Lifecycle

Lifecycle
Perennial
Leaf Lifecycle
Deciduous
Seasons of Interest
Summer, Fall, and Winter
Bloom Time
Fall (late summer through fall)

Wildlife

Attracts Wildlife
Attracts bees and butterflies, Attracts birds, Attracts other pollinators

References

Taxonomy

Taxonomic Rank
Species
Author
L.
Publication
Sp. Pl. : 906 (1753)

Superior Taxa

Kingdom
Plantae
Subkingdom
Pteridobiotina
Phylum
Angiosperms
Order
Asterales
Family
Asteraceae
Subfamily
Asteroideae
Tribe
Heliantheae
Subtribe
Helianthinae
Genus
Helianthus

Synonyms

Helianthus angustifolius subsp. angustifolius Discomela angustifolius Helianthus angustifolius var. angustifolius Helianthus angustifolius var. planifolius Coreopsis angustifolia

References

Taxonomic data from World Flora Online, accessed June 20, 2024

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