I just moved into my house, so this is my first spring in the new place. We have a big clump of azaleas (at least two, maybe three different kinds)next to the garage, between the driveway and a brick retaining wall. There is something wrong with all of the plants and I'm not sure what it is. The foliage on all of the plants is small and underdeveloped, and the leaves look 'frosted'. As new growth comes out, it looks OK initially, then it starts turning white. The edges and ends of the leaves usually retain some color. Is this some kind of fungus? Maybe a problem with the soil? It could be too alkaline since they are next to pavement and masonry that could be leaching lime into the soil. Also, the plants are very leggy and could use a good pruning. Do I need to treat whatever this is before I prune?