Grow Rhododendron cat. 'Cunningham's White' (Rhododendron 'Cunningham's White') for dependable spring bloom and year-round structure. You will get dense, leathery evergreen foliage and trusses of flowers that open white from soft pink buds, making it a strong choice for foundation beds, woodland edges, and protected borders.
Plant it where you can provide acidic, humus-rich soil that holds moisture but drains well. Morning sun with afternoon shade is ideal in warmer summers, but the plant can also be grown in shade where it will appreciate brighter conditions. Mulch with pine bark or leaf mold to keep roots cool and evenly moist, and water during dry spells, especially while the shrub is establishing.
Prune only if you need to shape the plant, and do it right after flowering so you do not remove next year's buds. Deadheading is optional; if you do it, snap off spent trusses carefully without damaging new shoots. Protect from drying winter winds and avoid high-pH sites that can cause yellowing leaves.
Give it room to mature, and keep the root zone undisturbed; rhododendrons have shallow, fibrous roots. Pair it with other acid-loving shrubs and shade-tolerant perennials for a layered, evergreen look through all seasons.