In warm regions, it can be planted outdoors. So, usually, they are grown indoors or in greenhouses. A 2-inch layer of mulch on the soil around the plant can help preserve the moisture. In Hawaii too, several species of gardenia are found. ✦ The plants require less water when they are not blooming. More studies are required to understand the pharmacological potential of this plant. These cookies will be stored in your browser only with your consent. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We provide informative articles about gardening, lawn care and landscaping that you can come back to again and again when you have questions or want to learn more! Gardenias do well in large pots on decks and patios; gardeners in cold-winter areas can grow them in cool greenhouses. The dark green leaves have prominent veins. The Kleim's Hardy Gardenia is one of the only gardenia varieties that can withstand relatively cold temperatures. As of now, scientists have been successful in identifying 140 species of the genus ‘Gardenia’. It is called zhīzi and kuchinashi in China and Japan respectively. You can also use a good pH modifier, for example, phosphoric or nitric acid. This category only includes cookies that ensures basic functionalities and security features of the website. But opting out of some of these cookies may have an effect on your browsing experience. Avoid fertilizing them in the fall as you don't want new growth impacted by frost. In traditional Chinese medicine, the fruit has been used to treat fever. A number of cultivars have been developed, for example, G. ‘Aimee’, the early-flowering (spring) form, G. ‘Shooting Star’ and G. ‘Chuck Hayes’ which are known for cold hardiness, G. ‘Summer Snow’ that shows greater resistance to cold climates (can be grown in zones 6-10), etc. Kauai Seascapes Nursery reports that slow growers add 12 inches or less each year, moderate growers add 1 to 2 feet each year, while fast growers can average more than 2 feet each year. ✦ Frostproof and some other varieties like Chuck Hayes can tolerate relatively cold temperatures. Leave 4-6 feet of space in between two gardenia plants. This website uses cookies to improve your experience. Depending on the species, use a 2- to 5-gallon container. Unfortunately, they make poor houseplants— they attract mites, mealybugs, and whiteflies. We also use third-party cookies that help us analyze and understand how you use this website. Maturity. We hope you are enjoying Gardenerdy! If you don't want to amend your soil, consider growing gardenias in pots. We'll assume you're ok with this, but you can opt-out if you wish. When grown from seed, gardenias will take about two to three years to start flowering. If you want to enjoy the divine beauty and intoxicating fragrance of gardenia flowers, here’s how to grow this plant. ✦ In cooler regions, it may not be an easy-to-grow plant. ✦ Add acid-based, water-soluble fertilizer to the soil every three weeks. ✦ Select a healthy plant. ✦ Cover the ground with mulch, especially, pine mulch, as it helps increase the acidity of the soil. Along coastal areas, these shrubs can thrive in full sun, but in hotter inland climates, they need some shade to protect them. Sign up to receive the latest and greatest articles from our site automatically each week (give or take)...right to your inbox. Fertilizing. Let potted plants grow naturally or clip and train them as topiary standards. An overdose can kill the plant. ‘Plena’ and ‘Radicans’ are also quite popular. Get in touch with us and we'll talk... Frostproof gardenia is a fast-growing, perennial, evergreen, flowering shrub. If the soil feels dry, water the gardenias. ✦ Whiteflies, aphids, spider mites, thrips, and mealybugs can affect the health of the plant seriously.