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

Cosmos

Botanical Name
Cosmos bipinnatus
Hardiness
Half hardy annual
Height
12 to 72 inches
Width
12 to 24 inches
Flowers
Summer till frost: red, rose, pink, purple
Light
Full sun
Soil
Well-drained
Planting & Care
  • Space plants 12 inches apart
  • Avoid over fertilizing - results in no blooms and floppy plants
  • Heat and drought tolerant
Problems
Aphids, bacterial wilt, aster yellows, Japanese beetles
Varieties
  • Sea Shells - fluted petals, 36"
  • Sonota - dwarf, 20"

Related Content

Upcoming Live Events
& Webinars


April 26, 2025
Organic Gardening Basics
Ebert's Greenhouse Village
Ixonia, WI

May 3, 2025
Low-Maintenance Gardening
Merton, WI
Register here

May 7, 2025
FREE WEBINAR:
Vertical Gardening
Register here


May 10, 2025
Ask the Plant Doctor Q&A
Ebert's Greenhouse Village
Ixonia, WI

May 11, 2025
Ask the Plant Doctor Q&A
Ebert's Greenhouse Village
Ixonia, WI

May 15, 2025
FREE WEBINAR:
7 Steps to Managing Water on Your Property

Register here

May 17, 2025
Ask the Plant Doctor Q&A
Ebert's Greenhouse Village
Ixonia, WI

May 18, 2025
Ask the Plant Doctor Q&A
Ebert's Greenhouse Village
Ixonia, WI

June 4, 2025
FREE WEBINAR:
Attracting Hummingbirds

Register here

June 8, 2025
Selecting the Right Hydrangea
for Your Landscape

Ebert's Greenhouse Village
Ixonia, WI

June 14, 2025
Houseplants 101
Ebert's Greenhouse Village
Ixonia, WI

June 20, 2025 (event 6/20-6/22)
Pollinator Celebration
Vino in the Valley
Maiden Rock, WI
Register here

WATCH ON-DEMAND WEBINARS

Learn More

Book an Appearance

Learn More

Enter to Win

Wild Valley Farms' Wool Pellets 
& Gardener's Bundle 

ENTER NOW