No Southern garden is complete without a generous helping of gardenias. These classic plants will perfume your garden all summer long with their delicious, sweet fragrance. And, even when not in bloom, gardenias sport shiny, bright, evergreen leaves that look great in every season. Gardenias are also able to withstand the brutal summer heat and humidity of a typical southern summer. Most are hardy outdoors from zones 8-11.
Choose Shrub or Tree Forms
Because gardenias come in both shrub and tree forms they can be used a variety of ways in your landscape. Try three or more as a low, dense hedge along a fence or walkway. Or, mix in just a few here and there in an existing shrub border. Tree forms are especially wonderful when grown in containers with a carpet of colorful annuals planted below.
Perfect for Patios
If you live in a cold-winter area, you can enjoy the beauty and fragrance of gardenias in pots on your patio, porch, or deck. They grow beautifully by themselves or with tropicals such as hibiscus, mandevilla, and jasmine.
Soil and Siting
Mulch for Moisture
Gardenias can get thirsty so it’s a good idea to mulch them with several inches of pine straw or shredded bark to help maintain consistent soil moisture. During dry spells make sure your gardenias receive at least one inch of moisture per week. If a gardenia doesn’t get enough moisture or sunlight the flower buds may not open or might fall off before they flower.
Learn more about mulch.
How to Plant
Give a Snack
Once established, apply a slow-release fertilizer designed for acid-loving plants in mid-spring and midsummer. Pruning is rarely necessary, but if you decide to trim your plants, do it right after the flowers fade. If weeds pop up around your gardenias, pull them by hand. Gardenias have shallow roots and you can harm them if you hack away at the weeds with a hoe or spade.
Get tips for keeping your yard free of weeds.
Outdoors is Best
On occasion, you’ll see gardenias sold as gift plants for indoor use. But, growing gardenias in your living room is generally not recommended because they don’t get enough sunlight in a home situation and there’s often not enough humidity in the air to keep them happy.