Helianthus, False Sunflower, Perennial Sunflower, Thin-Leaved Sunflower 'Sunshine Daydream'

Helianthusdecapetalus

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Helianthus (hee-lee-AN-thus)
Species
decapetalus (dek-uh-PET-uh-lus)
Synonym
Helianthus multiflorus
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
4-6 ft. (1.2-1.8 m)
Spacing
24-36 in. (60-90 cm)
36-48 in. (90-120 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)
Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Flowers are good for cutting
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
Patent Information
Propagation Methods
Seed Collecting
Regional

This plant is said to grow outdoors in the following regions:

Crest Hill, Illinois

Hamilton, Ohio

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Gardener's Notes:

1
positive
1
neutral
0
negative
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M
Pownal, ME (Zone 5b) | June 2020 | neutral

The plant in the above photo is the cultivar 'Sunshine Daydream'. The species is single, not a double-petalled form.

C
Hamilton, OH (Zone 6a) | June 2014 | positive

I discovered this plant in the fall of 2013 while participating in a Master Gardener event at the Plant Trial Day at the Cincinnati Zoo a...Read More

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