Melinda Myers

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"