Photo by Melody

PlantFiles: Sawtooth sunflower
Helianthus grosseserratus

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Helianthus (hee-lee-AN-thus) (Info)
Species: grosseserratus (gros-ser-AY-tus) (Info)

2 vendors have this plant for sale.

2 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)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)

Spacing:
9-12 in. (22-30 cm)
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)

Hardiness:
USDA Zone 3a: to -39.9 C (-40 F)
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)
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:
Bright Yellow

Bloom Time:
Late Summer/Early Fall
Mid Fall

Foliage:
Herbaceous

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
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; stratify if sowing indoors

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral JodyC On Jan 17, 2005, JodyC from Palmyra, IL (Zone 5b) wrote:

The most common visitors to the flowers are bees, especially long-tongued species. Among these are honeybees, bumblebees, Epeoline Cuckoo bees, Eucerine Miner bees, large Leaf-Cutting bees, and others. Other insect visitors include Syrphid flies, bee flies, butterflies, moths, and beetles. The caterpillars of some Checkerspot butterflies (Chlorsyne spp.) feed on the foliage, while Sunflower Borer Moths (Papaipoma spp.) eat the pith of the stems. These and other insects feed on this and other sunflowers (see Insect Table). Many kinds of upland gamebirds, songbirds, and rodents eat the seeds. These animals probably help to distribute the seeds. Beavers and muskrats may use the stems to construct dams or lodges when this plant is near bodies of water. Large mammalian herbivores, such as White-Tailed Deer and cattle, may browse on larger plants, while groundhogs and rabbits are more likely to attack smaller plants.

Regional...

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

Burr Ridge, Illinois



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