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PlantFiles: Thin-leaved Sunflower
Helianthus decapetalus

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Helianthus (hee-lee-AN-thus) (Info)
Species: decapetalus (dek-uh-PET-uh-lus) (Info)

One vendor has this plant for sale.

5 members have or want this plant for trade.

Category:
Perennials

Height:
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

Spacing:
15-18 in. (38-45 cm)

Hardiness:
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
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)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun

Danger:
Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Late Summer/Early Fall
Mid Fall

Foliage:
Herbaceous

Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Patent Information:
Non-patented

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

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By LadyAshleyR
Thumbnail #1 of Helianthus decapetalus by LadyAshleyR

By LadyAshleyR
Thumbnail #2 of Helianthus decapetalus by LadyAshleyR

By Zaragoza
Thumbnail #3 of Helianthus decapetalus by Zaragoza

No details have been posted.

Regional...

This plant has been said to grow in the following regions:

Oakland, Maryland
Frenchtown, New Jersey
Austin, Texas



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