Hello. I'm a novice gardener in Maryland. Two years ago my wife and I transplanted a spindly rose bush from a shaded area to a sunny spot next to our garage. As you can see, it promptly climbed and gets full of blooms in the spring-early summer, but then the leaves begin the fall off and it loses blooms. I'm concerned that it gets too bushy, allowing for mold/mildew growth. Among other things to address this issue, should I trim back this bush this time of year (before it buds) and, if so, how much? It started re-growing so vigorously a couple of weeks ago, so I hate to touch it, but I also want it to be healthy through the summer.