Cosmos sulphureus
Botanical Name
Cosmos sulphureus
Hardiness
Half hardy annual
Height
12 to 72 inches
Width
12 to 24 inches
Flowers
Summer till frost: yellow, orange, red
Light
Full sun
Soil
Well-drained
Planting and Care
Space plants 12 inches apart, avoid over fertilizing - it results in floppy plants with no blooms
Problems
Aphids, bacterial wilt, aster yellows, Japanese beetles
Varieties to Consider
'Cosmic Orange' - 2" flowers, 12" tall, AAS
'Diablo' - semi double orange flowers, AAS winner 1974, 18-30"
'Ladybird' Series - 12" semi double flowers
'Sunny Red' - 1987 AAS winner, flowers red with yellow, 12"
'Diablo' - semi double orange flowers, AAS winner 1974, 18-30"
'Ladybird' Series - 12" semi double flowers
'Sunny Red' - 1987 AAS winner, flowers red with yellow, 12"
Did you know?
Planting Cosmos is a great way to invite goldfinches and butterflies into your yard.