Woodland Sunflower
Helianthus strumosus

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

Category:

Perennials

Foliage Color:

Blue-Green

Bloom Characteristics:

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

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us

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

Velvet/Fuzzy-Textured

Other details:

Unknown - Tell us

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

Regional

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

Madison, Alabama

Hinsdale, Illinois

Benton, Kentucky

Richmond, Maine

Burgettstown, Pennsylvania

Orefield, Pennsylvania

show all

Gardeners' Notes:

2
positives
0
neutrals
0
negatives
RatingContent
Positive

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

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.