After we cut large conifers which shaded a 30 year old rhododendron, this one became exposed to morning and mid day Sunlight instead Of just afternoon sun. It hardly set any new leaf, and no bud, and leaves are drooping. We made a frame and draped large sheet do N-sulate, a permeable fabric, and after 2 days, leaves look the same. I have watered the leaves, and the soil. Any suggestion?