A new and distinct cultivar of Azalea plant named ‘RLH1-11P1’, characterized by its upright to somewhat outwardly spreading and globose plant habit freely basal branching habit dense and bushy appearance vigorous growth habit and rapid growth rate evergreen, persistent dark green-colored leaves that do not abscise during the winter freely flowering habit with remontant flowering during the spring, summer and autumn large, non-persistent single to semi-double flowers that are soft red in color during the spring and becoming more rose red in color during the summer and excellent garden performance and temperature tolerance.
