How to grow Cosmos

How to grow Cosmos

Cosmos (Cosmos bipinnatus)

Cosmos are a great option for beginner gardeners as they require minimal effort. These highly productive flowers have the cut-and-come-again quality, which means that the more you cut, the more they will bloom. Their delicate and airy appearance makes them an excellent addition to any garden or bouquet.

Details:

Plant type: annual

Height: 36-42”

Site: full sun

Days to maturity: 75-90 days

Plant spacing: 9”-12”

Pinch: when 12” tall

Kids, Pets and Deer: non-toxic, deer resistant

Indoor & Pots: not suitable for pots

 

How to Grow:

Transplant: sow 5-7 weeks before last frost, covering the seeds lightly. Harden off and transplant outdoors after all danger of frost has passed. 

Direct seed: sow after last frost, once the soil has warmed up and cover up lightly.

Germination: 7-10 days at 68-72°F (20-22°C)

 

Harvesting/Vase Life:

Harvest when the petals are just opening, but not yet flattened. Individual blooms don’t last long in the vase, about 4-6 days, but each stem is loaded with multiple blossoms that open over a period of a week.

Leave a comment