This is true for any plants. The larger plant may win the struggle for water and nourishment simply because it has a larger root system. If you have the roses a few feet away they're probably okay, since the crepe has a shallow root system.

Thank you so much for your reply.

Like eahamel said, it depends on the plants and the distance. But my other thought is that if they're planted under trees chances are they won't get enough sun to grow or bloom well anyway. Roses really do prefer all day full sun to really thrive and preform well. The very minimum of 6 hours of full sunlight will allow them to survive but they need at least 8 hours to do their best. I can't think that under any tree they would get that much light. If you have a sunnier and less competitive place to move them to I would do so. In your zone it could be possible to move them in the fall but I can't be certain of that. My suggestion would be to wait until early spring and move them as soon as you can work the soil. They will probably be just starting to come out of dormancy and ready to grow so that is the best time to make any moves.

Soussan - If you could post a picture of where your roses are now, that wold be most helpful, as everyone on here is guessing as to how close they are to other plants, whether or not they are under trees, etc. It is really easy - you just click on "choose file", and then choose the pic, and it magically shows up.

It is true, of course, that roses need sunlight. However, there is a lot of misinformation out there to the effect that roses need to be planted in their own beds, far away from any other plants. That is nonsense. I have a garden with about 150 roses, and they are near, next to, tangled with, growing up through, lots of other plants & trees.

I would not move your roses now. I would not move them at all unless you see next Spring that they are not doing well. Again, would love to see a pic!

Jackie