Cosmos Flowers
Q.

Tallest cosmos?

Zone I think we are a zone 5, we live in NJ | tlv571 added on October 11, 2015 | Answered

I have two cosmos in my yard that are probably about 13 ft tall. When I try to search to see how tall they get, the tallest I have found is 6 ft. The seed packet said they would get to be 3-4 ft tall; however, these are about 13 ft!! Have you ever heard of this?

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on October 13, 2015

It is not unusual to get very tall Cosmos, they can reach 6 to 8 feet, so if they are quite happy and have a nice long growing season, 13 feet seems doable.

Perhaps you want to save the seeds of your tallest plants to grow them again.

I grow Cosmos in my garden and I do find that the first year they stay smaller and with each year of self seeding they get taller.

https://www.gardeningknowhow.com/ornamental/flowers/cosmos/growing-cosmos.htm

00
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

Learn More