Gardenia is a plant that belongs to the rubiaceae family. It takes its name from a Scottish botanical Garden, which lived in the 18th century. This plant fears frost and is often grown indoors, although it is of course possible to plant it outdoors to decorate your garden with its green and shiny leaves and white flowers. This plant has long been given special significance. Indeed, it was supposed to attract positive vibes, so it was very often found in the rooms of sick people.
The species of gardenias
There are many varieties like gardenia jasminoides or Cape jasmine, gardenia magnifica or gardenia thunbergia. If the first and second can reach 2 m in height, the third city can rise up to 5 m in open ground.
Plantation of gardenia
Outdoors, it is best planted in May or June. Mix your soil with dried leaves as well as heather soil in a partial shade location. Be sure to provide it with acidic, rich, well-drained soil. In pots, it can be planted all year round in heather earth and leaf mold. It is not recommended to place it in the sun, however a bright place is imperative for its development. For perfectly drained soil, place clay balls at the bottom of the pot.
Cultivation and maintenance of gardenia
The gardenia hate limestone, it is advisable to water it with rain or spring water. Watering should be done when the soil is dry throughout the summer. In winter, one watering per week is sufficient. Humidity is important for this plant, do not hesitate to wet the leaves (but not the flowers). A plant fertilizer is appreciated twice a month during the summer. When you consider that your potted plant does not have enough space, repot, preferably in early spring.
Size of gardenia
The pruning of the gardenia consists in removing the withered flowers and making a pruning.
Multiplication of gardenia
It is a question here of cutting the branches in spring. For this, select cuttings from 8 to 10 cm and place them in pots made up of earth and peat. The soil should be moist when cuttings and then watered moderately. It is in late summer that we can repot. You can also opt for sowing which consists of sowing the seeds in a terrine and placing the special sowing soil in the light to promote germination. Keep a moist soil.
Gardenia diseases and pests
Aphids and mealybugs are the main enemies of this plant. If it is possible to control the former by spraying the plant with water, the latter can be smothered by spraying rapeseed oil on the leaves. Finally, gray rot sometimes attacks this plant, Bordeaux mixture makes it possible to fight effectively against this disease.