How to Care for Cosmos

Cosmos Flower image by Photo by Jim Gober


Cosmos are colorful, warm season, annual, native wildlflowers that attract butterflies and make good cut flowers. Cosmos are easy to grow and can be found in red, orange, yellow and double-flowering varieties. Cosmos are good for a child's garden or a beginning gardener as the seeds are easy to handle, and plants can thrive with minimal care.

How to Grow and Care for Cosmos

Step 1

Find a location in the back of the garden that receives at least 6 hours of direct sunlight each day. Cosmos grow tall and spindly so an area away from high winds is preferable.

Step 2

Clear planting area by removing plants and grasses that will compete with new cosmos plants. Rake area smooth, and avoid packing the soil.

Step 3

Before spreading cosmos seed, mix seed with a little garden soil in a bucket or container. This will allow you to spread the seed evenly, and cover seed with a thin layer of soil at the same time.

Step 4

Spread cosmos seed mixed with soil evenly over planting area. Ideally, seed should be covered with 1/8 inch of soil, so add more garden soil if needed. Do not pack down the area after seeding.

Step 5

Lightly spray planting area with water without washing the thin soil layer from seed. Keep planting area damp until cosmos plants appear in 5 to 7 days.

Step 6

Water plants weekly or when they become heat stressed.

Tips and Warnings

  • Some parts of the cosmos plant are toxic if eaten.

Things You'll Need

  • Rake
  • Garden soil
  • Small bucket or container
  • Cosmos seed
  • Water source


  • how to grow cosmos
  • where to buy cosmos seed
Keywords: cosmos flowers, grow cosmos, cosmos plant care, cut flowers

About this Author

Based in Rockdale Texas, Jim Gober has been writing garden-related articles for 25 years. His articles appear in several Texas newspapers including The Rockdale Reporter, The Lexington Leader, The Cameron Herald and The Hearne Democrat. He is a Master Gardener and Certified Texas Nursery and Landscape Professional. He holds bachelor degrees in English Writing from St. Edward's University and Finance from Lamar University.

Photo by: Photo by Jim Gober