Gardenias require considerable maintenance. Fall or spring is the best time for planting. Plant in light to moderate shade, preferably with minimum competition from tree roots. Gardenias resent root disturbance. They also grow well in pots.

Gardenias prefer acid, moist, well-drained soils. Add plenty of organic matter, such as compost or ground bark, to as large an area as possible. Mulch plants instead of cultivating. A good time to feed gardenias is mid-March, using an acid plant food, fish emulsion or blood meal. Feed the shrubs again in late June to encourage extra flowers on everbloomers or faster growth of young shrubs. Do not fertilize gardenias in the fall. Doing so will stimulate tender growth, which may be killed if the temperature in winter drops below 15 degrees. Gardenias are cold-sensitive and during severe winters can be killed to the ground in the Upstate. Often they regenerate in spring.

Prune shrubs after they have finished flowering to remove straggly branches and faded flowers. Water gardenias regularly. Drip-irrigating the shrubs will keep water off the foliage and blossoms and prevents leaf spots. Regular watering is necessary after blooming also to keep the plants in good condition and able to withstand winter weather.