A new and distinct cultivar of Azalea plant named ‘；RLH1-19P17’；, characterized by its compact, upright to outwardly spreading and mounding plant habit； moderately vigorous growth habit and moderate 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； single-type flowers that are red purple in color during the spring； and excellent garden performance and temperature tolerance.
