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There are several reasons why a rosebush may not bloom, so I will just touch on a few. Sometimes too much nitrogen or high nitrogen fertilizer will cause the roses to stop blooming. They will produce alot of foliage but either few or no blooms. If you do not currently give your roses Kelp meal you may want to try that, along with some Super Phosphate and some Muriate of Potash. These should all be available at a local nursery, greenhouse or garden center. Also if the roses are not getting alot of sunlight, that too can cause a severe decrease in blooms. Another reason for no blooms is that some roses are once bloomers and some bloom only on the old wood or previous years growth. If they are older roses this could be the case with them. Severe pruning each year can eliminate all the blooms for that year with these older roses.

You might try aluminum plant props as they have a circular head for securing the branch, and the narrow stem of the prop makes it nearly invisible in the garden. You could see if support from props would help the branches gain strength, especially if the rose bush is fairly young. For another possibility, it could be the flowers are weighing down the branches. It also could be that the branches are too long and should be trimmed.

Roses won't bloom unless they get a lot of heat. Make sure you prune them way back in the fall and don't over water .They should start getting more blooms as the weather heets up.Let the gound dry before watering.

Spring time is best.

I think they might do better somewere the ground isn't so compact. A parking lot has a lot of harmfull fums and other chmicails that will seep into the ground .If you plan on moving them its better to do it in the fall when the are not blooming and make sure they are cut back for more blooms the following year,.

In my area it is the intense rays of the sun and the strings of 90 degree and hotter days. They just cannot move enough water through their stems or canes to keep the foliage looking good. It is a very good idea to keep an eye on the soils moisture though, as with the heat and a wee bit of wind the moisture gets sucked out of the ground pretty quickly. If you can do something to create some shade for them during the hotter parts of the day, that will help big time. Things should get back to normal once the temps cool off some.