There are several reasons why your rhododendron is not blooming. 1. Too much shade/not enough light. 2. Wrong variety for climate. Buds do not set or get frost-nipped or destroyed by cold, drying winds. 3. Drought/dry soil as rhodies prefer to be constantly moist. Water regularly and thoroughly, paying special attention not only during summer drought but also in springtime; fertilize sparingly twice a year; top-dress with compost (but not too thickly, as rhododendrons have shallow root systems); make sure they’re getting some sun, and your rhodies should bloom next year.
There are several reasons why your rhododendron is not blooming. 1. Too much shade/not enough light. 2. Wrong variety for climate. Buds do not set or get frost-nipped or destroyed by cold, drying winds. 3. Drought/dry soil as rhodies prefer to be constantly moist. Water regularly and thoroughly, paying special attention not only during summer drought but also in springtime; fertilize sparingly twice a year; top-dress with compost (but not too thickly, as rhododendrons have shallow root systems); make sure they’re getting some sun, and your rhodies should bloom next year.