They are best planted in light to partial shade; preferably with morning sun and afternoon shade. This may occur if gardenias are limed or are planted near a new concrete foundation. Gardenias prefer acid (with a ph of less than 6. For horticultural oil, mix and spray a 2% solution (5 tablespoons of oil per gallon of water). These can be easily controlled with insecticidal soap sprays.
Gardenia tree mature height. Smaller cultivars will also grow well in containers and placed where their fragrance can be enjoyed. Follow label directions for mixing and application. Root rots caused by several different fungi can also be a problem, primarily in poorly drained soils. Fertilize the shrubs again 6 weeks later to encourage extra flowers or faster growth of young shrubs. Instead of numerous insecticidal sprays, a single soil drench of imidacloprid can be applied at the base of the shrubs in the spring as new growth appears to give season long control. They are waxy, white and very fragrant. Gardenias are considered deer resistant.
Flickr: creative commons license 2. All foliar sprays may need to be repeated once or twice at 10 day intervals, as they typically do not kill the eggs. Dwarf cultivars, however, are often more cold sensitive.