Helianthus annuus

Helianthus annuus

Annual sunflower

Previous scientific name(s): Helianthus annus ssp. jaegeri, Helianthus annus ssp. lenticularis, Helianthus annus ssp. texanus, Helianthus annus va

Drought tolerant annual; full sunlight. Yellow daisy-like flowers with dark centers grow two inches across. Multi-stemmed plant grows irregularly in waste areas such as abandoned farm fields, roadsides, or gravel pits. Easily established, often found in large colonies. Seeds provide good food for many birds; highly sought after by dove.  May be listed as noxious in some states.

Varieties: 

Species Attributes

Height: 
36 
- 72 
in.
Life Form: 
Annual
Native or Introduced: 
Native
Precipitation: 
Low
Sun & Shade Tolerance: 
Full Sun
Elevation: 
ft.

Soil Texture

Coarse: 
Marginal
Moderately Coarse: 
Best
Medium: 
Best
Moderately Fine: 
Average
Fine: 
Not Adapted

Soil pH

Acidic: 
Average
Neutral: 
Best
Basic: 
Marginal
Seeding Rate: 
10 
- 20 
PLS lbs/Acre
Pure Seed per Bushel: 
39.20 lbs.
Seeds per Pound: 
58,500
Germination Time: 
Days
Mycorrhizal Dependent: 
Yes
Bloom Color: 
Yellow
Blooming Season: 
Summer