What's your question? Ask

Cosmos Flowers

Q.Sowed Cosmos Seeds March, September No Flowers

Zone Senghenydd, Wales | Van win added on August 31, 2020 | Answered

These plants are 5-6 foot tall, stems thicker than your thumb. Very strong and healthy. 6 months later, still no sign of a single flower. Good fallow earth, added T&M flower food July & Aug.

A.Answers to this queston: Add Answer
Certified GKH Gardening Expert
Answered on September 1, 2020

It sounds like a problem with nutrient ratios. Too much nitrogen and not enough phosphorus and potassium can cause these symptoms. In general, the soil could be too rich in nutrients. These flowers cannot handle fertile soils.

Test your soil for deficiencies, overloads, or pH swings and correct as needed. Here are some articles that will help:



This article will help you to grow the flowers:


Was this answer useful?

Log in or sign up to help answer this question.

Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?
here are more questions about...
Cosmos Flowers
Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert