Helianthus, Annual Sunflower, Common Sunflower
Helianthusannuus 'Hungarian Black Seeded'

Category
Annuals

Water Requirements

Sun Exposure
Full Sun

Foliage
Smooth
Succulent
Velvet/Fuzzy

Foliage Color
Chartreuse/Yellow

Height
12-15 ft. (3.6-4.7 m)

Spacing
24-36 in. (60-90 cm)

Hardiness
Not Applicable

Where to Grow

Danger
N/A

Bloom Color
Bright Yellow

Bloom Characteristics

Bloom Size

Bloom Time
Mid Summer

Other details

Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information

Propagation Methods
From seed; direct sow after last frost

Seed Collecting
Collect seedhead/pod when flowers fade; allow to dry