Main points of propagation of Gardenia jasminoides

Gardenia is one of the most popular courtyard and potted flowers. The double petal variety of gardenia makes gardenia more famous. Because of the growth habit of Gardenia jasminoides, Gardenia jasminoides is used as a potted plant in northern China and needs to survive indoors in winter. The editor will introduce to you the points for attention in the reproduction of gardenia.

Gardenia

For propagation cuttings, mature and sturdy branches of one year are cut in April and May, cut into 10mur15cm long, with 3 leaves at the top, and inserted in the sand bed. Under the conditions of temperature above 20 degrees and relative humidity above 80%, they can take root in about 40 days. If you dip it in the vitamin B12 injection solution before insertion, take it out and hang it for a minute or two, and then insert it after the solution is sucked into the cuttings, it can shorten the rooting time for about 10 days and improve the rooting rate. The cutting sand bed should be covered with plastic film for heat preservation and moisturization. it can be propagated in a small amount, or soaked in water in a glass; it can also take root at a temperature of 20 degrees, 28 degrees and 40 days. Sowing can also reproduce, and it can be sowed immediately after receiving the seed, but because the seed dormancy period is long, it can only germinate after one more year, and most of the cultivated varieties are not fruitful, so they are rarely used.

Culture methods of Gardenia jasminoides and matters needing attention

Gardenia, alias yellow gardenia, white toad, etc., is an evergreen shrub or small tree of Rubiaceae. It is native to central China and is now widely cultivated in various places.

For domestic gardenia, it is necessary to master its physiological characteristics in order to make leaves, flowers and fruits beautiful and improve the ornamental value.

Soil. Mizihua likes to grow in acidic soil with more humus. It can be mixed with 4 parts of rotten leaf soil, 4 parts of vegetable garden soil, 1 part of soybean meal (mature) and 1 part of river sand, with good water permeability and air permeability, and then mixed with 0.5% black alum or sulfur.

Temperature. The best temperature for growth and development of Gardenia jasminoides is 20-25 ℃, and the optimum temperature for flowering is 26-28 ℃. The plants cultured for 4-5 years can endure a short-term low temperature of-3 ℃, suffer frost injury below-5 ℃, the leaves blacken and fall off, and the young shoots freeze to death. In winter, indoor maintenance should be kept at 6-10 ℃ degrees, and the minimum should not be less than 0 ℃. If the room temperature is higher than 15 ℃, the south-facing doors and windows should be opened, properly ventilated and lowered the temperature, otherwise it is easy to cause germination and will be damaged in case of low temperature, which is very disadvantageous to the growth and flowering of the following year.

Light. Gardenia likes adequate light, especially in spring and autumn, giving more than 8 hours of sunshine a day, otherwise it is disadvantageous to its growth and development and winter overwintering. Summer avoid noon strong light exposure, otherwise the leaves will turn yellow, to place astigmatism maintenance, light transmittance up to 40-50% is appropriate. Put indoors in the south-facing direct sunlight place in winter.

Fertilize. Gardenia is not a very fertile flower, but due to its exuberant growth and limited nutrients in the basin soil, it needs reasonable fertilizer during the growing period. When mature human feces, urine or cake fertilizer is applied every 10 days or so, watering should be stopped one day before fertilization, and permeable water should be watered at the same time on the day of fertilization. Fertilizer will be stopped from the middle of September. The adult plants were added 0.5-1 taels of sesame sauce residue in mid-June and mid-August respectively, which were fully mixed with topsoil after crushing.

Water it. The gardenia flower likes the flood, some people call it "water gardenia". In spring, because of more wind, strong wind, dry air and little rainfall, it is watered every 3 days, and water is sprinkled around the potted flowers every morning and evening to improve air humidity. The weather is hot after summer, so water less in the morning and water thoroughly after two o'clock in the afternoon. It is suitable to be irrigated with soft water in summer, because there are more calcium and magnesium salts in hard water, which is very disadvantageous to the growth of gardenia. In order to overcome the alkalinity of soil and water quality, alum fertilizer was irrigated once a week in the growing season to keep the branches and leaves of gardenia green. Winter should be controlled watering, do not dry do not water, long-term water content is too much, easy to cause rotten root death.

Pick the heart. In order to regulate and control the growth of gardenia, make the plant shape beautiful and promote flowering, when the exuberant growth will stop in spring, the top of the new branch will be removed to promote the full axillary bud at the base of the branch and the formation of flower bud.

Notes on Gardenia jasminoides

Gardenia is often prone to yellowing of leaves, which is caused by a variety of reasons, so different measures should be taken to prevent and cure it. Chlorosis caused by lack of fertilizer: this chlorosis starts from the old leaves in the lower part of the plant and gradually spreads to the new leaves. Nitrogen deficiency: simple yellow leaves, new leaves small and brittle. Potassium deficiency: old leaves change from green to brown. Phosphorus deficiency: old leaves are purplish red or dark red. For the above cases, rotten human feces and urine or cake fertilizer can be forced to apply. Chlorosis caused by iron deficiency: this yellowing disease occurs on new leaves. At first, the leaves are yellowish or white, the veins are still green, and in severe cases, the veins are yellow or white, and eventually the leaves will dry up and die. To this kind of situation, can spray 0.2% Mel 0.5% ferrous sulfate solution to prevent and cure. Chlorosis caused by magnesium deficiency: this yellowing disease begins to develop from old leaves to new leaves, and the veins are still green. In severe cases, the leaves fall off and die. For this situation, 0.7% Mel 0.8% boron and magnesium fertilizer can be sprayed to prevent and control. Excessive watering and freezing can also cause the phenomenon of yellow leaves, so special attention should be paid to it in the process of maintenance.

Key points of Gardenia Culture

The cultivation of gardenia in China has a long history. From the 17th century to the 18th century, gardenia was introduced into Europe, which aroused widespread interest from local horticulturists and flower lovers, and spread to the United States in the early 19th century. After continuous cultivation, many new varieties of gardenia have emerged, such as double winter blooming, pot planting with four seasons flowering, varieties specially used for cut flowers, and single and double varieties with yellow and white markings on the leaves.

The plant of Gardenia jasminoides is 1 to 2 meters high, with yellowish roots and branched stems. Leaves simple, opposite, a few in whorls of 3, leathery, shiny, long elliptic, entire. Stipules membranous, usually 2-lobed, enclosing branchlets, flowers large, white, with short pedicels, fragrant, solitary in branch ends or leaf axils. Calyx green, cylindric, base narrowing, apex with several lobes, tube nearly as long as lobes. After opening, the Corolla is saucer-shaped, usually 6-merous, 5-merous or 7-merous. The capsule is Obovate or elliptic, golden yellow or orange when ripe, with 5 to 8 winged longitudinal ribs and 5 to 8 narrow lanceolate persistent calyx at the top, nearly equal to the length of the fruit. Seeds numerous, oblate, yellow-white. The flowering period is from May to June and the fruit ripening period is from November to December.

Gardenia likes humid air and warm climate, and grows well in well-drained, loose and fertile acid soil. It is shade-tolerant and cold-tolerant. The leaves fall off under-12 ℃, and are often cultivated in greenhouse in North China. It has strong sprouting ability and tillering ability, and is resistant to pruning.

Cuttings, striping and sowing are usually used for propagation. Cutting is carried out in the rainy season, when the air humidity is high and the temperature is between 20 ℃ and 25 ℃, which is beneficial to the rooting of cuttings. Cuttings can be cut into 15 cm-long branches with sturdy shoots of the same year, and 2 to 3 upper leaves are retained and inserted into the seedbed of loose and permeable sandy soil. The striping method was carried out in the first ten days of April, and the 2-to 3-year-old strong branches were pressed in the soil, which could take root in about 1 month, cut off the mother plant in the middle and late June, and transplanted to the nursery bed management. Spring sowing is suitable for sowing and raising seedlings, but the seedlings bloom later.

Transplanting seedlings should be carried out in the rainy season. When planting, the plant should take the soil ball, choose the soil is fertile, loose, moist land to plant. It should be watered frequently during the high temperature period in summer to increase humidity. Apply more rotten fertilizer and water before flowering, and apply around the root with 10% human feces and urine or bean cake water, which can make the leaf Maohua big and fragrant. After entering the autumn, little or no fertilization, so there is a "fertilization but autumn" said, so as not to grow branches and leaves, vulnerable to freezing injury. If it is found that the leaves of Gardenia jasminoides turn yellow, apply alum fertilizer (containing 1% ferrous sulfate) to make the leaves bright green. Potted gardenia, to prepare fertile, loose and acidic culture soil, rich in humus. Keep sufficient water during the growing period, which can promote the blooming of pregnant buds. Frosts Descent moved indoors to spend the winter. If aphids and wax scale are found in the leaves in the rainy season, 1000 times of dimethoate can be sprayed to control them.

Gardenia jasminoides is a commonly used traditional Chinese medicine, which is used for medicinal purposes. It has the functions of purging fire and removing annoyance, clearing heat and dampness, cooling blood and detoxification and so on. Its fruit can also be used to make dyes.

Eight skills and maintenance points of daily culture of gardenia

Many people like to raise some plants, gardenia is one of them, it is white and elegant, pleasant fragrance, good decorative effect, so it is loved by everyone. Many people know that gardenia has no experience in growing flowers, and there is often a phenomenon of wilting, so I would like to ask you how to raise gardenia. The following provincial many decoration network editor to summarize the gardenia daily breeding skills and maintenance points, let's take a look.

Eight skills and maintenance points of daily culture of gardenia

First, acid soil culture

Gardenia needs scattered light, so like acid soil, if the soil is alkaline, it will make gardenia can not absorb iron very well, which has a great impact on the formation of chlorophyll, and further cause flower branches to wither and even die; therefore, the soil must use loose, fertile acid soil, and some substances with such effect can also be added.

Second, put it in the shade.

Gardenia must not be exposed to the hot sun, otherwise the leaves will wither and yellow, but it does not mean that it should be put in the whole shade, because it has a certain demand for light, it is best to keep 60% of the light every day, in addition, after entering April, fertilizing should be carried out twice a month.

Third, air humidity

Gardenia likes to be wet, so the air should not be too dry. according to expert statistics, if the air humidity is less than 70%, it will affect the normal opening of flowers, but if it is too wet, it will cause rotting roots and yellowing leaves, so in addition to normal watering, clean water should be often sprayed nearby. Another problem that should be paid great attention to is that water should not be watered too much, or it will also affect growth. When you see the soil is dry, tap the flowerpot with your hand. If there is an empty sound, it needs to be watered, and the bottom of the flowerpot starts to leak and stops. It is better to add some eggs and soy milk to the water, which is more conducive to growth.

Fourth, tips for fertilization

Gardenia like fertilizer, but can not add too much fertilizer at one time, must be thin fertilizer, do not save trouble, otherwise it will cause thick branches, big leaves, thick green, it will lose its own appreciation effect.

Fifth, temperature requirements

The growth temperature of gardenia can not be too low, because it likes temperature, generally speaking, the temperature during the growing period is 18 to 22 degrees, 5 to 10 degrees in winter, and frostbite if it is below 10 degrees below zero, which should be paid special attention to in the north.

Sixth, proper pruning

Gardenia is very easy to grow luxuriant branches and leaves, and cause airtight and disorganized feeling, which will cause nutrition dispersion and poor ornamental, so it is necessary to prune it, it is best to choose three main branches when pruning, and cut off the roots and tillers to sprout new branches at any time, and the branches should be cut short in time after flower shedding, so that new branches will sprout under the cut. When the new branch grows three nodes, it is necessary to pick the heart so as not to grow blindly.

Seventh, disease prevention

We usually see four kinds of diseases of gardenia:

A, iron deficiency, which is the most common, iron deficiency will cause the formation of chlorophyll, and then make the leaves lose green, when you can use ferrous sulfate water and low concentration of black alum water, three times a month.

B, magnesium deficiency will lead to yellow veins of the lower old leaves of Gardenia jasminoides, so it is necessary to spray with low concentration of magnesium sulfate solution.

C, the soil is too wet or too dry, this can be seen in the third point

D, the sun exposure, this can refer to the second point.

Eighth, breeding methods

Generally speaking, there are two propagation methods of Gardenia jasminoides: cutting and striping.

A, cuttings, 15 cm long with twigs in the rainy season, planted in the seedbed and rooting in 12 days.

B, in April, biennial branches were selected, which were 2O-25 cm long, buried in the soil and kept moist, about 30 natural roots were separated from the mother plant in summer and planted in the next spring.

Matters needing attention in Gardenia Culture

The main results are as follows: 1. The propagation method of Gardenia jasminoides is cutting method, pressing method and plant division method.

2. Pay attention to the disease and pest control of gardenia. Gardenia is generally prone to yellow horse disease. In addition, leaf spot disease and canker occur from time to time. We should pay more attention to it. Gardenia is also easy to be attacked by a kind of whitefly pest. If you encounter it, you can consult a professional for pest control.

3. Gardenia is very sensitive to water, so a tile basin with good permeability should be used as the bottom of the basin, so that watering gardenia will not cause stagnant water, resulting in yellowing and shedding of leaves, and even death of flower plants in serious cases.

4. As for the cutting time of Gardenia jasminoides, the first half of the year is in April, and the second half of the year is from August to September, which is the best season for gardenia to multiply.

5. It is not suitable to apply fertilizer before and after gardenia cutting. At this time, it only needs to grow naturally, even if it is natural fertilizer, urea, chemical fertilizer and so on.

Gardenia cultivation method is not complicated, on the contrary, it is a relatively easy to take care of the plant, no matter where it is placed, it plays its own small value, especially when the flowers bloom in early summer, the fragrance is refreshing. Learn more about small apartment decoration cases, decoration knowledge, please pay attention to the provincial many decoration network, a decoration platform that saves worry and money.