What's your question? Ask

Hyacinth Plant

Q.knock out roses

Zone 12078 | Anonymous added on October 18, 2018 | Answered

I live in the foot of the Adirondack mountains in new York state. should I cover and/or prune the knock out rose bushes for winter? If I need to prune, then how low to the ground should that be?

A.Answers to this queston: Add Answer
Answered on October 19, 2018

It looks like you are in agricultural or hardiness zone 4b/5a. This puts you on the edge of KnockOut roses hardiness zone. There are 2 things you should do to over-winter them: 1. Make sure the soil is moist right up until the ground freezes; 2. mulch the rose crown and rootball with 3-4 inches of mulch. Straw, pine boughs, chopped leaves and shredded or chipped wood are all fine. Snow acts as an excellent insulator. If winters are severe, you will have some winter-kill of rose canes. In early spring as the leaf buds are swelling or breaking open, prune back as far as needed to reach pith (inside of cane) that is white. I have had years where I needed to prune everything down to 12-18 inches. Even so, the roses roared back and were the same height as previous years by mid-summer. Here is more info: https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/care-knockout-roses.htm

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...
Hyacinth Plant
Join Us - Sign up to get all the latest gardening tips!

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