Helianthus, Annual Sunflower, Common Sunflower
Helianthusannuus 'SunDuke Mammoth'

Category
Annuals

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

Sun Exposure
Full Sun

Foliage
Succulent

Foliage Color

Height
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)

Spacing
9-12 in. (22-30 cm)

Hardiness
Not Applicable

Where to Grow
Can be grown as an annual

Danger
N/A

Bloom Color
Gold (yellow-orange)

Bloom Characteristics
Flowers are good for cutting
This plant is attractive to bees, butterflies and/or birds

Bloom Size

Bloom Time
Mid Summer

Other details

Soil pH requirements

Patent Information

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
Bag seedheads to capture ripening seed
Collect seedhead/pod when flowers fade; allow to dry
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds
Allow unblemished fruit to ripen; clean and dry seeds
Properly cleaned, seed can be successfully stored