Photo by Melody
It's time now to VOTE in our 14th annual photo contest! Voting ends November 7, so be sure to cast your votes for your favorites in each category here. Good luck to all contestants!

PlantFiles: Giant Sunflower
Helianthus giganteus

bookmark
Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Helianthus (hee-lee-AN-thus) (Info)
Species: giganteus (jy-GAN-tee-us) (Info)

Synonym:Helianthus alienus
Synonym:Helianthus borealis
Synonym:Helianthus subtuberosus
Synonym:Helianthus validus

3 vendors have this plant for sale.

7 members have or want this plant for trade.

Category:
Edible Fruits and Nuts
Perennials

Height:
36-48 in. (90-120 cm)

Spacing:
12-15 in. (30-38 cm)

Hardiness:
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)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun

Danger:
N/A

Bloom Color:
Gold (Yellow-Orange)
Bright Yellow

Bloom Time:
Mid Summer

Foliage:
Herbaceous

Other details:
This plant is attractive to bees, butterflies and/or birds
Requires consistently moist soil; do not let dry out between waterings

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

Patent Information:
Non-patented

Propagation Methods:
By dividing the rootball
From softwood cuttings
From seed; direct sow outdoors in fall

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Remove fleshy coating on seeds before storing
Properly cleaned, seed can be successfully stored

Click thumbnail
to view:

By paracelsus
Thumbnail #1 of Helianthus giganteus by paracelsus

By scirpidiella
Thumbnail #2 of Helianthus giganteus by scirpidiella

By scirpidiella
Thumbnail #3 of Helianthus giganteus by scirpidiella

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive paracelsus On Jan 25, 2008, paracelsus from Elmira, NY (Zone 6a) wrote:

A very handsome perennial native plant that flowers the first year from seed. Airy, kind of like coreopsis.

Regional...

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

Palm Harbor, Florida
Valdosta, Georgia
Croton On Hudson, New York
Bend, Oregon
Houston, Texas
Farmington, Utah
Puyallup, Washington



We recommend Firefox
Overwhelmed? There's a lot to see here. Try starting at our homepage.

[ Home | About | Advertise | Media Kit | Mission | Featured Companies | Submit an Article | Terms of Use | Tour | Rules | Privacy Policy | Contact Us ]

Back to the top

Copyright © 2000-2014 Dave's Garden, an Internet Brands company. All Rights Reserved.
 

Hope for America