I have a large azalea (6ft+) next to front door which is all legs. It only has crown of leaves at top with little to no new growth below 4ft. I'd like to cut it back and start over to allow it to blend with two new azaleas I planted nearby earlier this summer. I'm in zone 7a - is it too late in the year for a hard prune? I don't care about blooms next year so long as it has leaves. Thanks!