Large-flowered rhododendrons (Rhododendron catawbiense) benefit from “deadheading”, the practice of removing the old spent flower heads.  Deadheading encourages increased branching, which frequently results in more blooms the following spring. It also cleans up their scruffy appearance. Small-flowered types (including ‘PJM’, lepidote rhododendrons, and azaleas) do not benefit from deadheading and are mostly […]