It could be that your rosebush has some insect issues that are causing such issues. A stressed rosebush will perform erratically. It could also be that the nitrogen content of the fertilizer being used is too high, which leads to lots of foliage and reduced to no blooms. Some funguses can cause blooming issues as well and so can limited sunshine. Check the roses out well and what is being used to feed and care for them, therein could be the problem.
Answered on March 17, 2017
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