Cosmos sulphureus
Sulfur Cosmos
Description
Cosmos sulphureus is an annual that is easily grown in average, medium moisture, well-drained soils in full sun. Tolerates dryish soils. Also tolerates poor soils. Avoid rich fertile soils because plants may grow too tall and flop over. Plant seed in the garden just before last spring frost date. Seed may also be started indoors about 4-6 weeks prior to the last spring frost date. Deadhead spend flowers to prolong bloom. Taller plants may be cut back. Plants will sometimes self-seed, particularly if seed drops on bare ground. Self-seeding may rise to the level of being aggressive in some climates and conditions. Seed may be harvested in fall for planting the following spring. -Missouri Botanic Garden
Plant Type
Annual
Height Range
3-6'
Flower Color
Orange, Red, Yellow
Flower Season
Summer, Fall
Leaf Color
Green
Bark Color
n/a
Fruit Color
n/a
Fruit Season
n/a
Sun
Full, Half
Water
Low
Growth Rate
Fast
Soil Type
Sandy, Clay, Loam, Rocky, Unparticular
Soil Condition
Average, Well-drained
Soil pH
Neutral
Adverse Factors
n/a
Design Styles
English Cottage, Meadow, Seascape, Woodland
Accenting Features
Fall Color, Showy Flowers
Seasonal Interest
Summer, Fall
Location Uses
Entry, Patio, Raised Planter, Walkways
Special Uses
Container, Cut Flowers, Filler, Mass Planting
Attracts Wildlife
Butterflies
Water Saving Tip:
Apply a layer of mulch around plants to reduce moisture loss.
Choose organic mulches, such as shredded bark, compost or aged sawdust.