Hello, I have a “ Radrazz” knockout rose. It’s 3 years old and is doing mostly ok but this summer the Japanese beetles got to it badly and it flowered but not as much as in years past. There are a couple of small dead canes on it. Is this normal and becuase of the Japanese beetles? Also when should I prune my knockout rose? It’s starting to develop buds for next year but not all the canes have buds so I want to to know when to prune?
I have never covered my knockout roses before but now that my landscaper cut them from 5 ft to less than 2 ft should I cover them for winter? We live in southeastern PA (near Philadelphia).
You are in USDA hardiness zone 7, and Knock Out roses are hardy to zone 5, so you shouldn't need to cover them. You may want to add at least 3 inches of mulch around the plant.
It is more common to wait till spring to cut them back, but they should be fine. If there is dieback in spring, prune them down more as outlined in the article below.
https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/care-knockout-roses.htm
I just went out to cut a knock out rose back a bit. It only gets about 3-4 hours of sun in the summer, so it's leggy. It looks like something cut the main root below ground and there is only a 5 inch diameter of small roots. Praying it's not a vole. I dipped it in root stimulus and potted it so I can keep an eye on it. How can I help it grow more roots? Should I skip pruning? Thanks
Yes, you can skip pruning because you want it to focus on growing roots. Keep it watered and continue good rose care to help it recover.
https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/care-knockout-roses.htm
I have a rose bush that seemed to die overnight. The bush is well established and appeared to be “healthy”. It bloomed, the leaves were good looking. Then seemingly overnight all blooms were dead and the leaves were brown and dried as if it hadn’t been watered in months. I have attached two photos, the live bush is planted next to the problematic bush.
It could be from overwatering, which led to root rot. It also could be a fungal disease, insect pests, or too much fertilizer. Here is more:
https://www.gardeningknowhow.com/ornamental/flowers/roses/brown-edges-on-rose-leaves.htm
https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/knockout-roses-turning-brown.htm
https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/knockout-rose-diseases.htm
Hello, I'm just wondering what might be the cause of a knockout rose bush only getting flowers on the top part of the stems. There aren't any flowers on the middle or lower sections of the bush. I have some carpet roses that do the same thing. Any help/ideas would be appreciated!
Knock Outs bloom on new wood so they need to be cut down to about 12 inches each spring. (You can cut them to the ground if the stems are black.) That will give you about a 3 foot bush by summer's end. If you want it to be larger, just cut it back to 2 feet.
https://www.knockoutroses.com/pruning
It could be the same case on your carpet roses.
All the leaves have dried up and fallen off. What I thought were bud nodes are getting brown. I have followed instructions for planting (repotting from the store) and care of these plants. What have I done wrong? Can I save my rose? I'm desperate to bring it back to life. Help!
Unfortunately, your photos did not come through. There are quite a number of reasons why roses will fail at transplant. This can be under or overwatering, soil that is already infected, soil with too much nutrients, insect damage, among many other factors.
In the meantime, this article will help you to understand some of the common problems with roses:
https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-bush-diseases.htm
How far can I cut them back without damaging or killing the whole bush?
This will be in Spring, and you can cut the plant back by about 1/3. Whether this be across the top, or just removing 1/3 of the plant's branches. Here is an article for more information:
https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/prune-knockout-roses.htm