A new and distinct cultivar of Azalea plant named ‘；RLH2-4P1-5’；, characterized by its compact, upright to outwardly spreading and mounding plant habit； vigorous growth habit and rapid growth rate； freely basal branching habit； dense and bushy appearance； relatively small and evergreen dark green-colored leaves that do not abscise during the winter； freely flowering habit with remontant flowering during the spring, summer and autumn； hose-in-hose to double hose-in-hose flowers that are light red purple in color with white-colored centers during the spring； and excellent garden performance and temperature tolerance.
