• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide

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"

Related Content

Upcoming Webinars & Appearances


May 18, 2022
Food Gardening
in Gardens or Containers

West Bend, WI
(in-person)

May 28, 2022
Rose Care 101
Ebert's Greenhouse Village, Ixonia, WI
(in-person)

June 1, 2022
Creating a Pollinator Paradise
(webinar)

June 15, 2022
Supporting Native Bees
(webinar)

June 18, 2022
Wonderful World of Hydrangeas
Ebert's Greenhouse Village, Ixonia, WI
(in-person event)

June 22, 2022
Maintaining Your Landscape
with Pollinators in Mind

(webinar)


Watch Melinda's past webinars ON DEMAND

Learn More

Book an Appearance

Learn More

Enter to Win
3 bags of Wool Pellets and reduce your need to water by 25%

ENTER NOW