Photo by Melody

PlantFiles: Stiff Sunflower
Helianthus pauciflorus subsp. subrhomboideus

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Helianthus (hee-lee-AN-thus) (Info)
Species: pauciflorus subsp. subrhomboideus

Category:
Perennials

Height:
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

Spacing:
Unknown - Tell us

Hardiness:
USDA Zone 3b: to -37.2 C (-35 F)
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)

Sun Exposure:
Full Sun

Danger:
N/A

Bloom Color:
Bright Yellow
Brown/Bronze

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Herbaceous

Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Flowers are good for cutting
Flowers are good for drying and preserving

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing the rootball
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From herbaceous stem cuttings
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Direct sow as soon as the ground can be worked

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored

Click thumbnail
to view:

By KSBaptisia
Thumbnail #1 of Helianthus pauciflorus subsp. subrhomboideus by KSBaptisia

By KSBaptisia
Thumbnail #2 of Helianthus pauciflorus subsp. subrhomboideus by KSBaptisia

No details have been posted.

Regional...

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

Beatrice, Nebraska
Wood River, Nebraska



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