Photo by Melody

PlantFiles: Woodland Sunflower
Helianthus strumosus

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Helianthus (hee-lee-AN-thus) (Info)
Species: strumosus (stroo-MOH-sus) (Info)

2 vendors have this plant for sale.

5 members have or want this plant for trade.

Category:
Perennials

Height:
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)

Spacing:
9-12 in. (22-30 cm)
12-15 in. (30-38 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)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Full Sun
Sun to Partial Shade
Light Shade

Danger:
Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Late Summer/Early Fall
Mid Fall

Foliage:
Herbaceous
Blue-Green
Velvet/Fuzzy-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
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)

Patent Information:
Non-patented

Propagation Methods:
By dividing the rootball
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Collect seedhead/pod when flowers fade; allow to dry

Click thumbnail
to view:

By melody
Thumbnail #1 of Helianthus strumosus by melody

By melody
Thumbnail #2 of Helianthus strumosus by melody

Profile:

2 positives
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive NicoleC On Sep 5, 2012, NicoleC from Madison, AL (Zone 7b) wrote:

Lovely plant found along woodland edges. Survives in dense competition and in poor acidic soil. Blooms in the late summer and early fall and is very attractive to bumblebees.

Positive melody On Aug 18, 2005, melody from Benton, KY (Zone 7a) wrote:

Found in open woods, thickets and clearings from Ontario to New Brunswick, south to FL and west to TX, and north to ND...and everywhere in between.

It blooms in August and Sept with yellow flowers that sit atop slightly hairy stems.

I great native plant that naturalizes well.

Regional...

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

Madison, Alabama
Burr Ridge, Illinois
Benton, Kentucky
Richmond, Maine
Burgettstown, Pennsylvania
Orefield, Pennsylvania



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