Helianthus, Annual Sunflower, Common Sunflower
Helianthusannuus 'Bicentenary'

Family: Asteraceae (ass-ter-AY-see-ee)
Genus: Helianthus (hee-lee-AN-thus)
Species: annuus (AN-yoo-us)
Cultivar: Bicentenary

Category
Annuals

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Full Sun

Foliage
Succulent

Foliage Color
Bronze

Height
4-6 ft. (1.2-1.8 m)

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

Hardiness
Not Applicable

Where to Grow

Danger
N/A

Bloom Color
Bright Yellow
Brown/Bronze

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

Bloom Size

Bloom Time
Mid Summer
Late Summer/Early Fall
Mid Fall

Other details

Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information
Non-patented

Propagation Methods
From seed; sow indoors before last frost
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed