Cosmos sulphureus

Cosmos sulphureus

Yellow cosmos

Drought tolerant; full sun. Bright sulfurorange flowers explode from the tall branching stems of this annual species from summer through fall. An easily established plant on most sites but prefers coarse soils. Widely used in beautification or roadsides, exposed slopes, or background landscaping.

Varieties: 

Species Attributes

Height: 
24 
- 36 
in.
Life Form: 
Annual
Native or Introduced: 
Introduced
Precipitation: 
Low
Sun & Shade Tolerance: 
Full Sun
Elevation: 
ft.

Soil Texture

Coarse: 
Average
Moderately Coarse: 
Average
Medium: 
Best
Moderately Fine: 
Average
Fine: 
Marginal

Soil pH

Acidic: 
Marginal
Neutral: 
Best
Basic: 
Marginal
Seeding Rate: 
15 
- 20 
PLS lbs/Acre
Pure Seed per Bushel: 
14.90 lbs.
Seeds per Pound: 
55,000
Germination Time: 
Days
Mycorrhizal Dependent: 
Yes
Bloom Color: 
Orange-Yellow
Blooming Season: 
Summer
Fall