The latest culture methods and matters needing attention of Gardenia jasminoides

Gardenia beautiful appearance, very attractive, give off a fresh smell, with a good ornamental value, cultured gardenia green leaves, white as jade, do you know what are the breeding methods and matters needing attention of gardenia? What are the reasons why mast flowers do not blossom? Let's take a look at it together.

Propagation methods of Gardenia jasminoides

1. Cuttage propagation: from May to June, select semi-lignified, fully developed twigs, cut into 10mur15cm long, soak the base with 1000 mg / kg naphthalene caproic acid for 3 seconds, cuttage in acidic soil with strong water and fertility conservation, generally use 3 parts of rotten leaf soil or mountain mud, 1 part of sawdust, peat or river sand, take root about 1 month after planting, and transplant after 50 days. The method of water insertion is often used in summer in the south, which is carried out from April to July. The cut cuttings, which are 15 centimeters long and with 2 or 3 leaves on the top, are inserted on the basket lid or perforated plastic board, and the lid or plastic plate is floated on the surface. The upper part of the insert can be exposed to the water. Put it in the semi-shade after insertion and keep the water temperature for 16-18 ℃. New roots can grow in 20 days. When the temperature is high, change the water frequently, change the water once a day, can not make the water deteriorate. When the root is 2-3 cm long, it can be transplanted.

2. Striping propagation: most of them are carried out in May to June. Select 1-year-old, 2-year-old strong branches, 25 cm long, pressed into the soil 3 cm 5 cm, about 1 month can take root, 2 months later can be cut off from the mother. Can also be high pressure, that is, on the adult gardenia, choose 2-3-year-old strong branches ring peeling 1cm, and then wrapped in moist peat, the outside wrapped with plastic bags to keep the soil moist, about 40 days can grow new roots, 2-3 months later cut off the mother.

3. Ramet propagation: in May, there are 2 or 3 branches growing at the base of the root, which can be cut from the root with a knife, and each ramet has fine roots. After the wound is coated with plant ash, it will be planted separately.

Culture method of Gardenia jasminoides

1. Potted soil selection: gardenia is an indicator flower in acidic soil, and the suitable pH value is 5 to 6. Therefore, the slightly acidic environment of the soil is the key to determine the growth of gardenia. If the soil acidity is not suitable, it will get twice the result with half the effort in the future management. The culture soil is made of 70% of slightly acidic sandy red soil and 30% of rotten leaves. It is appropriate to control the soil pH value between 4.0 and 6.5. Cultivation soil can choose rotten leaf soil, peat soil or retting sawdust plus half of the garden soil, avoid using old wall soil and cinder, with the market-sold gentleman orchid soil is more convenient and practical.

2. Scientific watering: gardenia likes moist soil and greater air humidity. Keep the basin soil moist during the growth period from April to September. Watering should be increased appropriately during the growing period. Usually the pot soil can be watered once the soil turns white and thoroughly at one time. Hot and dry in summer, spray to the leaves 2-3 times a day to increase air humidity and help plant cool. However, after the flower budding, watering should not be too much, so as not to cause bud drop. It is better to water dry in winter to prevent the roots from rotting. The surface of the basin soil is watered when it is dry, and a spray can be used to pour water on the leaf surface at night. If it is dry and wilted, it will be bad for growth. If the growth is too prosperous and the internodes are longer, they will not be watered in the evening and will be watered again when the sun comes out in the morning. In the area of alkaline water in the north, tap water should be kept for two days before use. Every three or five days, add 0.5 grams of citric acid and 1 gram of ferrous sulfate to water once per liter to make the leaves oily and green.

3. Rational fertilization: demand for fertilizer for gardenia: gardenia is a fertilizer-loving plant, and 3% rotten cake fertilizer can be added to the culture soil as base fertilizer. In the growing season, the alum fertilizer made by cake fertilizer and ferrous sulfate retting is watered once a week, or 0.1% humic acid total nutrient organic liquid fertilizer can be used. Watering 0.1% potassium dihydrogen phosphate aqueous solution once or twice in the bud stage can make the flowers fat and fragrant. Fertilizer is stopped when the temperature is above 35 ℃ in hot summer and below 15 ℃ in autumn. After entering the peak growing season in April, you can top fertilize every half month (you'd better mix more water when fertilizing to prevent burning flowers). This can not only meet the fertilizer demand of Gardenia jasminoides, but also keep the soil environment in a relatively balanced slightly acidic environment, prevent the occurrence of chlorosis, and avoid the damage of sudden supplement of ferrous sulfate and local excessive acid to gardenia.

4. Bask in the sun more: gardenia likes light and can grow in semi-shade for a long time, but the flower branches are longer and the flowers are less. In addition to the strong light from July to August noon need shade and winter dormancy period, generally need to be maintained in the sun in order to blossom and flourish.

5. Good dormancy in winter: gardenia can survive the winter in open field in Qinling Mountains of China, but the root system of potted gardenia will be damaged after severe winter and recover slowly in spring. In the indoor with heating, although it is not damaged by freezing, the light is insufficient and the growth is thin. Most of the young buds formed in autumn fall off and blossom late in the second year. The better way is to put the potted flowers in a cold room of about 5 ℃ to make them dormant, or wrap the flowerpots with foam and other thermal insulation materials to protect the roots, and put them in the leeward and sunny place to overwinter, which can recover quickly in spring and bloom early.

6. change the pot soil at the right time: the seedlings use small pots and gradually change into large pots. When the crown width is 2 to 3 times the caliber of the basin, it is time to change the basin. The growing season can be changed at any time. After pouring the basin, even the soil block is planted into the new basin, the caliber is about 5 centimeters larger than the original basin. Family potted plants when the pot reaches about 28 cm, generally no longer change the pot but only change the pot soil. It is better to change soil in March in spring. After pouring the basin, cut off part of the old roots, shake off half of the old soil, plant the new soil into the basin and pour water into the pot, put it in a warm semi-shady place, and keep it in the sun when new buds sprout.

7, appropriate pruning: gardenia jasminoides seedlings in the trunk 20 cm high to hit the top, leaving 3 to 4 branches, branches 2 pairs of leaves and then hit the top, promote branches, and then allow its growth. Lobular gardenia does not need to be topped. Trim lightly after flowering every year, cut off the inner chamber branches, diseased and weak branches, and some only grow short branches. When the crown width of Gardenia jasminoides is too large after 4 to 5 years, it can be strongly pruned after flowering, generally leaving 2 pairs of leaves in the upper part of the branch. After budding, the inward growing buds and the lower buds of the trunk will be erased, and the plant shape will become more compact and beautiful. Remember that gardenia can not be cut short in spring, otherwise it will not blossom in that year.

Matters needing attention in Gardenia Culture

1. Gardenia likes to be fat, but is afraid of thick fertilizer. Generally, the cake fertilizer containing more phosphorus and potassium is applied twice before budding, and the fertilization is stopped after budding. If too much fertilizer is applied, it is easy to burn roots and cause budding. During the growing period, rotten cake fertilizer water or manure fertilizer water was applied once every half a month, and 1%-2% ferrous sulfate was added to prevent soil alkalization.

2. Gardenia likes semi-shade and is afraid of strong light, so it requires a shade degree of about 50%. If exposed to the sun, the leaves turn yellow and whiten until they fall off, so they should be kept in a shady place or a place with scattered light in summer. Make it see light in the morning and evening to prevent the leaves from yellowing.