Hybrid rhododendron are evergreens that have dense foliage and flower in the spring.
Varieties:
Scintillation “Scintillat” Evergreen with pink flowers Zone 5-8
Catawbiense “Roseum Elegans” Evergreen with purple flowers Zone 4-8
Catawbiense “Chionoides” Evergreen with white flowers Zone 5-9
“Nova Zembla” Evergreen with red flowers Zone 4-8
“PJM” Evergreen with lavender-pink flowers Zone 4-8