Q.Knockout rose tree
Why do leaves turn yellow and then fall off? I have several rose trees. After being planted and healthy for two month or more, on some of them the leaves start turning yellow and eventually fall off. Some of them I pruned and after several weeks when I think they are dead, red leaves start coming on. Also, other trees are very healthy looking and green but do not produce roses. Why?
Here are some links to articles I wrote on these subjects, check them out and let me know if you have further questions or need of help.
https://www.gardeningknowhow.com/ornamental/flowers/roses/yellow-rose-leaves.htm
https://www.gardeningknowhow.com/ornamental/flowers/roses/leaves-falling-off-roses.htm
https://www.gardeningknowhow.com/ornamental/flowers/roses/no-blooms-on-roses.htm
