Q.Do I remove Strange stems growing in rose bush?
Rose bush planted 6 weeks ago has several very different looking stems shooting out from the base of the bush. They are thicker and bright green with dark reddish brown leaves. I attach a photo.
Should I remove them?
It looks like you have what is called a Grafted rosebush there. The bottom part of the graft is a hardy rootstock rose. There are times when the root stock tries to take over and sends up its own canes. If left to do as they wish, these canes will rob nutrients from the desired top part of the graft rosebush. So they need to be pruned out as close to the ground as possible. They will likely try to come back as well. So keep an eye on the bush and prune out that different looking wild growth.