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?

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1 Comment To "Knockout rose tree"

#1 Comment By roseman On 09/03/2015 @ 12:21 am

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 ^[1]

https://www.gardeningknowhow.com/ornamental/flowers/roses/leaves-falling-off-roses.htm ^[2]

https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/knockout-rose-leaves-yellowing.htm ^[3]

https://www.gardeningknowhow.com/ornamental/flowers/roses/no-blooms-on-roses.htm ^[4]

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URL to article: https://questions.gardeningknowhow.com/knock-out-rose-tree-why-do-leaf-turn-yellow-and-then-fall-off/

URLs in this post:

[1] https://www.gardeningknowhow.com/ornamental/flowers/roses/yellow-rose-leaves.htm: https://www.gardeningknowhow.com/ornamental/flowers/roses/yellow-rose-leaves.htm

[2] https://www.gardeningknowhow.com/ornamental/flowers/roses/leaves-falling-off-roses.htm: https://www.gardeningknowhow.com/ornamental/flowers/roses/leaves-falling-off-roses.htm

[3] https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/knockout-rose-leaves-yellowing.htm: https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/knockout-rose-leaves-yellowing.htm

[4] https://www.gardeningknowhow.com/ornamental/flowers/roses/no-blooms-on-roses.htm: https://www.gardeningknowhow.com/ornamental/flowers/roses/no-blooms-on-roses.htm

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