What is the recommended temperature to pre-cool potted azaleas to force them to bloom?

The recommended temperature to pre-cool potted azaleas in order to induce blooming is between 35-40 degrees F. This temperature range is crucial because it closely mimics the natural winter conditions that trigger the flowering process in azaleas. Pre-cooling helps to ensure that the plants undergo a stress period, allowing them to accumulate the necessary chilling hours. This physiological response is essential for the buds to develop and bloom appropriately.

Maintaining a temperature below 40 degrees F is particularly effective, as it facilitates the right balance of dormancy and readiness for growth. If the temperature were to exceed this recommended range, the plants may not respond as effectively to the chilling treatment, potentially leading to delayed or inadequate blooming.