Cosmos - Key Growing Information

A pristine 'Fizzy White' cosmos bloom raises its head above the foliage and buds of its bed fellows below.

DAYS TO GERMINATION:

7-10 days at 68-72°F (20-22°C)

SOWING:

Transplant - Sow into 50-cell plug flats or preferred seedling container 5-7 weeks before planting out, covering seeds lightly. Harden off and transplant out after danger of frost. Direct seed - Sow after last frost, once soil temperature is above 60°F (16°C), covering seeds lightly. Pinching encourages branching.

LIGHT PREFERENCE:

Sun.

PLANT HEIGHT:

Varies. Tall varieties may benefit from some wind protection, such as Hortonova, used as horizontal support.

PLANT SPACING:

9-12". Wider spacing creates stronger, thicker stems.

HARDINESS ZONES:

Annual.

HARVEST:

Petals just opening, but not yet flattened. Deadheading is required to have blooms all summer.

SOIL REQUIREMENTS:

Any soil.

USES:

Excellent cut flowers. Beds, containers, and mass plantings.

SCIENTIFIC NAME:

Cosmos spp.

Cosmos