This striking rhododendron cultivar produces funnel-shaped blooms with delicately ruffled margins, displaying a sophisticated colour gradient from deep pink edges that softens toward pale pink centres. The flowers arrange in a compact, upright truss for refined visual impact. Foliage features thick, elliptic leaves with an attractive curled texture and medium green colouring. Notably heat-resistant and sun-tolerant, 'Jan Dekens' thrives in diverse growing conditions while reaching approximately 6 feet tall within a decade, making it an excellent choice for gardeners seeking a reliable, adaptable specimen with exceptional ornamental qualities.