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Sulphur Cosmos

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 & 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
  • 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"

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