Rhododendron ‘Vallya’ produces a profusion of light pink flowers on an upright semi-deciduous plant. Bred for hardiness and disease resistance, it nevertheless needs soils amended with peat moss and/or treatment of the soil with powdered sulfur to survive long term in our heavy alkaline clay soils. Best grown in light shade and despite the need to keep the root constantly moist, the plant does not tolerate planting in low-lying sites where water stands for any length of time. This cultivar was developed by the Mezitt family who have owned the Weston nursery for three generations. Each of those generations have continued efforts to create rhododendrons hardy to USDA Zone 5 that are disease-resistant and very floriferous.