When the temperature suddenly drops and maintains 25 degrees or below, provide additional protection by driving stakes into the ground around the plants and draping material over the stakes. Choose burlap or any cloth material so the azalea receives air flow. Be sure the cover does not have direct contact with the plants as this can injure the foliage. Cover is especially beneficial for new azaleas or azaleas that were recently transplanted and have not had enough time to establish a strong root system.