Gardenia Flower Hardiness. How to Winterize Gardenia Outside. The extent of cold injury of gardenias is never certain until spring.
Flower buds will fail to form if the ideal temperature for Gardenias is not respected. Dec 28 2018 Gardenias have glossy green foliage and are attractive as specimen plants accent plants in mixed borders or hedge plants in full sun to partial shade. Gardenias perform best in day temperatures of 65-70F 18-21C and night temperatures of 60-65F 15-18C.
Apr 03 2011 The Kleims Hardy Gardenia is one of the only gardenia varieties that can withstand relatively cold temperatures.
They grow in. They grow in. 47 71 hires on Thumbtack. Department of Agriculture plant hardiness zones 8 through 11.