Rhododendron 'Sir Charles Lemon' showcases delicate white campanulate flowers with subtle red spotting arranged in compact ball-shaped trusses of approximately 10 blooms. This cultivar develops an upright, tree-like form with distinctive narrow foliage displaying bright cinnamon-brown indumentum and striking white new growth. A slow-blooming variety that reaches cold hardiness to 0°F (-18°C), it performs best with afternoon shade protection. Ideal for woodland gardens and mixed borders where its architectural growth habit and refined flowering can be fully appreciated.