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This article was co-written by Maggie Moran. Maggie Moran is a professional gardener in Pennsylvania.
There are 13 references cited in this article that you can view at the bottom of the page.
This article has been viewed 23,467 times.
Gardenia, also known as clematis, is one of the most fragrant flowers that can be grown at home, but it also poses a number of challenges for growers. Gardenia needs a certain acidity in the soil, plenty of water and light, cool temperatures and high humidity. Gardenia is also susceptible to insect infestation. However, if you overcome those challenges, you will be rewarded with fragrant fresh flowers that bloom from spring to all summer.
Steps
Planting For Outdoors
- Sprouts grow well in bright light, high humidity and even where water and nutrients are available. [2] X Research Source
- Although they can live indoors, hot, dry air and overcast winter days can cause plants to die.
- The ideal time to plant parsley is during spring and fall, when the sun is shining brightly but not too hot. [3] X Research Sources
- Plants will not bud if the daytime temperature is higher than 21 degrees Celsius, and the nighttime temperature exceeds 18.5 degrees Celsius or lower than 15.5 degrees Celsius . [4] X Research Source
- Note that gardenia cannot survive outdoors during winter. Then you should bring them into the house.
- Acidity is measured on a scale from 0 to 14, where 0 is the highest acidity and 14 is the most basic. Dendrobium likes acidic soil, so a pH of 5 or 6 is appropriate because it is moderately acidic. [5] X Research Sources
- If needed, you can add sulfur, a white powder sold in most gardeners, to lower the pH level in case the pH is higher than 6.
- The nature of the soil should be rich in nutrients and well drained. Gardenia requires a lot of nutrients but its roots can die if waterlogged. [6] X Research Source
- The root ball is the entire root of the plant and the soil surrounding the root.
- If the soil is barren, apply some compost to the hole before placing the root ball. Compost is an organic fertilizer that adds nutrients to the soil.
- Carefully choose the location of the bushes. If you grow plants near your house, you can enjoy the scent of the flowers while sitting at your desk or looking out from the window. But planting too close to the house means that the pH in the soil may be too high, not suitable for plants to grow well.
- You should also remember that gardenia needs a lot of light, but does not tolerate heat. Maybe you should plant the plant under the bedroom window rather than the kitchen window.
- Do this to compact the soil and remove all air pockets. You need to place the roots tightly in the soil so that the plant can absorb a lot of water and nutrients.
- If you plan to plant many gardenia trees, pay attention to place the root bulbs of each tree 0.9m to 1.8m apart. Gardenia can grow from 0.6m to 2.4m both in height and width. [7] X Research Sources Planting too thickly can lead to overcrowding, or roots competing with each other for water and nutrients.
Outdoor Care
- Regularly monitor soil moisture, and water enough when the soil is dry. Be careful not to over-water, because if the soil is too wet, the roots will lack air. [8] X Research Sources
- Humus not only helps the soil to be fertile, but also retains moisture, inhibits weed growth and maintains a stable temperature for the soil.
- For best results, choose humus from shavings, sawdust, and crushed bark.
- Mulching is extremely important because gardenia roots do not grow deep and are susceptible to weed attack. [9] X Research Source
- Pay attention to acid fertilizer for plants. This special fertilizer is formulated for acid-loving plants. Conventional fertilizers may not be enough to nourish gardenia.
- Be careful not to over-fertilize, as this can damage the plant by accumulating salt.
- Misting will increase the humidity around the plant, but only for a short time. Therefore, you need to do this every day to make sure the tree lives longer. [10] X Research Source
- In addition to misting, you can plant gardenia in clusters but not too thickly. This will create a humid environment. To add moisture, you can place a dish of water in the middle of the bush. As it evaporates, the moisture will wrap around the gardenia plants.
- Pruning young and underdeveloped plants will facilitate flowering. Young trees have great bounce, and lost branches will easily recover because they have not yet grown strong. [11] X Research Source
- Prune out slanted branches and dead flowers. Gardenia is a woody shrub, so pruning old branches will stimulate new growth.
- Prune the lowest branches that are at risk of touching the ground, which could expose the tree to disease. [12] X Research Source
- Do not cut off all the leaves. It is necessary to leave some leaves so that the plant can provide food for the roots. [13] X Research Source
- Mealybugs are gray, stinging pests. They eat the waxy part of the gardenia and leave a waxy layer on the tree that causes the branches to die, the tree to become barren and deciduous.
- Whiteflies are tiny white insects that resemble mosquitoes. They secrete a sweet substance and soot fungi will grow on it. This fungus will yellow leaves and drop leaves. [14] X Research Source
- If the plant is heavily infested with mealybugs, cover the entire plant with plenty of antiseptic soap or horticultural oil. Two days after the first application of disinfectant soap, carefully coat the soil with a beneficial fungus called Beauveria bassiana to destroy all root-eating mealybugs. Beauveria bassiana mushrooms are also available at gardening stores.
- Be sure to use a cardboard box large enough to cover the entire bush without bending the branches. You can use old blankets, straw or bubble wrap for extra wrap underneath the box. [15] X Research Source
- No matter how hard you try, the tips of the branches can still die and turn black from frost or cold. Then use sharp pruning shears to prune the branches a few centimeters below the damaged part.
- There is another way, you can transplant the plant in a pot and bring it into the house during the winter. While plants may face a higher risk of pest infestation, you can take the following steps to care for your gardenia indoors.
Indoor Care
- Bringing gardenia indoors during the winter when sunlight is scarce is a challenge. You can choose to supplement the light for plants with specialized lamps for plants.
- Gardenia also needs a room temperature of 13 degrees C during the day and 18 degrees C at night . [16] X Research Source Please adjust the room temperature accordingly and monitor the growth of the plant.
- Avoid cold drafts of plants and never place gardenias in a place where hot air is emanating from a fireplace. The dry air of a fireplace can cause your gardenia to fall to pieces – literally.
- You also need to water the plants. If the ground feels dry to the touch, water until the soil is sufficiently moist.
- Regularly test the pH of the soil to make sure it is between 5 and 6. Use a special fertilizer for flowering acid-loving plants. Fertilizers for azaleas will work well.
- As mentioned above, you can place gardenia pots in clusters and place a dish of water in the middle to increase the humidity. However, you should be careful when misting the plant, as spraying water directly on the plant at the same time as using a humidifier can cause fungus to grow on the plant.
- You can also place the roots directly on a tray of gravel and water. First, spread a layer of gravel on the tray and pour water to cover the gravel surface. The gravel layer will keep the roots above the water without being submerged in the water. Water will increase the moisture around the plant as it evaporates. [17] X Research Source
- It is best to prune the tree when the flowers have just fallen. Cut off dead branches until the desired size is achieved.
- One pest to watch out for is aphids, a small, pear-shaped insect with long legs and antennae. [18] X Source of study This aphids can be treated with a solution of one part soapy water to one part water. Spray on both upper and lower sides of leaves. This method is also effective against mealybugs. [19] X Research Source
- Red spiders are very small and difficult to see with the naked eye. To test for red spiders, shake the plant gently and collect under a piece of white paper. If you notice red, yellow, brown or green spots, the plant is probably infected with red spider mites. [20] X Research Source Treat this pest with neem oil – a vegetable oil made from the neem tree available at most grocery stores.
- Neem oil can also treat the spread of the pests mentioned above. If you have used the above methods but still see that the leaves are yellow, then the plant may be infected with root nematodes. Root nematodes are small parasitic worms that attack plant roots. Unfortunately, there is no cure for this disease. [21] X Research Source
Advice
- When choosing where to plant gardenia, you should keep in mind that there are some species of trees that can grow up to 2.4 meters in height and width.
Warning
- Gardenia may not be viable outside of climate zones 9 or 10 (according to USDA crop zoning).
This article was co-written by Maggie Moran. Maggie Moran is a professional gardener in Pennsylvania.
There are 13 references cited in this article that you can view at the bottom of the page.
This article has been viewed 23,467 times.
Gardenia, also known as clematis, is one of the most fragrant flowers that can be grown at home, but it also poses a number of challenges for growers. Gardenia needs a certain acidity in the soil, plenty of water and light, cool temperatures and high humidity. Gardenia is also susceptible to insect infestation. However, if you overcome those challenges, you will be rewarded with fragrant fresh flowers that bloom from spring to all summer.
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