Is it alright to to trim knockout roses In October or November. I don't want to do a heavy pruning I just want to cut them back maybe about a foot. Th...
Fall trimming of knockout roses #603241
Asked October 19, 2019, 5:28 PM EDT
Is it alright to to trim knockout roses In October or November. I don't want to do a heavy pruning I just want to cut them back maybe about a foot. They're over three feet now.
can remove any deadcanes now or anytime but the prime time to prune your Knockout
roses is in late winter or early spring. Since they are preparing for the winter season
pruning now could stimulate new growth which would make the plant susceptible
to frost damage.
The amount that you want to prune is
fine. The following websites suggest the
amount to prune which gives you the range you are looking to prune.
“Since KnockOut® roses
only reach a maximum height of 4 feet and a width of about the same they do not
require much pruning. Simply cut the canes back every year in late winter or
early spring to approximately 24 inches. Cutting them back very severely, like
a hybrid tea rose is not recommended. They won’t die but will require a long
time to recover. Periodically, older, declining, and broken canes will need to
be removed. This can be done at any time of the year.”
This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.