Question 2: When can azaleas survive pruning? The best time for pruning azaleas is after flowering, because azaleas bloom first and then grow leaves, and have consumed a lot of nutrients when flowering. After the flowers wither, new branches and leaves grow, which requires a lot of nutrients. At this time, due to insufficient nutrition supply, there are not many branches and the growth is weakened. Pruning after flowering greatly reduces the consumption of plant nutrients. Rhododendron fertilization should be based on the principle of thin application and frequent application. Fertilization is generally carried out in spring and autumn, and is generally not applied in winter. When flowering plants change pots in March and April, they should apply hoof slices or manure 1 time, and bean cakes or hoof horn fertilizer 1-2 times in May and June. In rainy season, the fermented cake fertilizer powder can be sprinkled on the basin surface and mixed evenly with the topsoil. Apply thicker liquid fertilizer again in autumn. Generally, in flowerpots with a diameter of 20 cm, the vigorous plants use about100g of bean cake fertilizer throughout the year. Rhododendron is a fertilizer-loving plant, which needs trace elements such as copper, molybdenum and zinc besides main nutrients such as nitrogen, phosphorus and potassium. Rhododendron should use fertilizer with moderate fertility and long fertilizer effect. Rhododendron can be raised at home with horns, horns and animal hooves. These fertilizers contain nitrogen 12% ~ 15%, phosphorus 0.2% ~ 8%, and a small amount of potassium and trace elements. Fine hoof 1 month can take effect, thick hoof angle can show fertilizer effect after 2 months, and fertility can be maintained for 6-8 months. When in use, the hooves can be buried at the edge or bottom of the basin in combination with changing and pouring the basin. Cake fertilizer is also a comprehensive nutrient fertilizer. The nutrients in cake fertilizer generally contain 2. 1%-7.6% nitrogen, 0.54%-3.3% phosphorus and 0.5%-2.7% potassium. Generally speaking, bean cake and peanut cake contain more nitrogen, while rapeseed cake and cottonseed cake contain more phosphorus. Fully ferment before use. Fertilizers made from livestock manure and leaves can be combined with changing pots and mixed into human culture soil. Different varieties of azaleas have different requirements for fertilizers. Rhododendron varieties in Dandong, such as Sihaibo, Shuanghuanghong and toad peony, use less fertilizer; Fairy dance, five treasures, Fugui Ji, etc. More tolerant to fat; Rhododendron macrophylla is more resistant to chemical fertilizers. How should azalea be fertilized? Rhododendron is a flower that doesn't need big chemical fertilizer. If the fertilizer is applied too much or too thick, it is not good for its growth. But this does not mean not to fertilize, but to let it bloom a lot, or to apply some fertilizer at the right time. Therefore, flower cultivation experts summed up eight words of fertilization experience: "less dry fertilizer, dilute liquid fertilizer." This is very suitable and worthy of reference for flower growers. Generally speaking, 1. Two-year-old seedlings don't need fertilization, because humus soil contains enough fertility to meet the needs of seedling growth and development. For 2-3-year-old plants, pancake fertilizer or alum fertilizer can be applied every 10- 15 days from late spring or hot summer. For plants over 4 years old, about 20 grams of dry cake fertilizer can be applied in spring and autumn every year. In mid-June, available phosphorus and potassium fertilizer can be applied once to promote flower bud differentiation. Fertilization can be stopped after June. After the flowers wither and the new branches grow, liquid fertilizer with a slightly higher concentration can be applied once, but it must not be applied too thick, let alone raw fertilizer, otherwise the root system will be damaged. In summer, excessive fertilization will make the old leaves fall off and the new leaves turn yellow. It is particularly noteworthy that the deviation of azaleas planted at home is not a lack of fertilizer, but an injury caused by excessive fertilization. If the leaves turn yellow due to excessive fertilization, immediately stop fertilization, dig out dry fertilizer, water more, and wash away the fertilizer in the accumulated soil. After watering, move to a ventilated place for maintenance, and some need to be washed twice. This will gradually grow normally after half a year. If there is no abnormality in summer, azaleas will start their second vigorous growth period after beginning of autumn. In this short period of time, it is possible to supply 1-2 times of phosphate fertilizer dilute solution to meet the needs of plant growth and bud pregnancy. After each fertilization, water is poured every two days, and the soil is loosened once, so that the basin soil is fully ventilated. After winter, as the weather gets cold and plants stop growing, fertilization should be stopped immediately. If you don't stop fertilizing and let plants grow tender leaves, it will make it difficult for rhododendrons to overwinter, so don't be careless.
Question 3: When to prune azaleas in winter or before Tomb-Sweeping Day, the growth of Guijuan is in a dormant period, and pruning is beneficial and harmless.
Question 4: How to prune azaleas and care for the cultivation techniques of azaleas in northern China.
Rhododendron is one of the top ten famous flowers in China and is known as "the beauty of flowers". There are many kinds of azaleas, which are luxuriant and colorful. Mainly distributed in the southwestern provinces of China, it is mainly divided into four categories: Mao Juan, Dong Juan, Xia Juan and Xi Juan, among which Xi Juan is the most beautiful flower among the cultivated types. In recent years, with the rise of flower industry, rhododendrons have also been widely cultivated in the northern region.
1, reproductive technology
(1) Cutting propagation is the most widely used propagation method in Rhododendron cultivation. Generally, in May and June, strong semi-lignified new branches, about 5-8 cm long, are cut off, and the lower leaves are cut off, leaving 2-3 upper leaves as cuttings. It is best to soak the base of cuttings in solutions such as indolebutyric acid or ABT rooting powder, and then insert them in loose and breathable acid soil rich in humus, and keep the temperature at 20-25℃ and cover them.
(2) Splitting of shoots For rare varieties that are difficult to survive, such as Xi Juan, the shoots are cut off about 3~4 cm as scions, the base is cut into wedges with a sharp knife, and the shoots are split with Mao Juan as rootstock, and then they are wrapped with plastic film in the shade, and the scion and rootstock are covered with plastic bags for moisture preservation.
2. Fertilizer and water management requires acidic soil (soil PH should be 5.5~6.5) for the growth and development of rhododendron. Because the soil in the north is mostly alkaline, the basin soil needs to be mixed with humus soil such as rotten pine needle leaf soil. The root system of rhododendron is whisker-like fine root, which requires strict fertilizer concentration and water quality. Fertilization should follow the principle of timely and appropriate application of thin fertilizer. In order to promote the growth of branches and buds before flowering in spring, phosphate fertilizer can be applied once a month. After flowering, apply 1~2 times of mixed fertilizer mainly containing nitrogen and phosphorus. Apply phosphate fertilizer 1~2 times in bud stage from September to June. In the growth period and flowering period, there are more requirements for fertilizer and water. In winter dormancy and slow growth in summer, fertilizer and water should be controlled to prevent root rot. Rhododendron likes a humid and cool environment, and the climate in the north is dry. It is necessary to water and spray drugs in time to maintain a high air humidity. It is best to water the flowers with alum fertilizer and rainwater, and add a small amount of ferrous sulfate and vinegar to ordinary water. Watermelon or tomato can also be cut into small pieces for application, which also has a good effect on improving soil quality and flower quality.
3. Shaping and pruning In order to speed up the flowering of plants, rhododendrons often promote the development of new branches by picking their hearts. For those flowers that are surrounded by flowers and affect the flower shape, the buds can be thinned early, which will not only make the flowers bright in that year, but also help the plants to grow and bloom in the next year. Rhododendron has strong germination, and its branches seriously affect the growth and development of plants, reducing their ornamental and commercial properties, which need to be adjusted by pruning. Pruning is usually carried out in spring and autumn after flowers wither. Prune dead branches, oblique branches, clustered branches and some cross branches to avoid nutrient consumption and make the whole flower full.
4. The flowering period controls the bud differentiation of Rhododendron in autumn. Through cold storage and heating treatment, the flowering period can be artificially controlled. To make rhododendron blossom ahead of time, we can move it to greenhouse for cultivation, control the temperature at 20-25℃, and often spray water on the branches and leaves to keep the relative humidity above 80%, so that it can bloom after one and a half months. In order to delay the flowering of azaleas, azaleas that form flower buds can be preserved at low temperature, kept at 2~4℃, watered when the basin is dry, moved out in summer and autumn, and can bloom in two weeks.
Respondent: Edogawa Xinyi-Director Department Grade 9 1-26 14:40.
Rhododendron is one of the representatives of acid-loving plants, with a pH value of 5.5-6.5, and likes a cool, humid and well-ventilated environment. The suitable growth temperature is 13℃-25℃, and the air relative humidity should be kept at 60%-70% during the growth period, and the relative humidity can reach about 80% when it is about to bloom.
Rhododendrons like light, but avoid direct glare. Shading should be appropriately increased in spring and autumn, and it should be around 70% in midsummer. Rhododendrons should be placed outdoors for ventilation in summer. Rhododendron prefers light fat to thick fat. During the growth period, it is advisable to apply it thinly and frequently, and it is best to use farmyard manure, such as liquid fertilizer after soaking and fermenting bean cake water, horseshoe palm water, various vegetables, chicken feathers, fish viscera and other impurities. Rhododendron is a fibrous root, slender and weak, so it can't use sticky soil, and it likes loose, breathable and breathable acid soil. Humus soil such as mountain mud mountain, larch leaf soil, or artificially prepared culture soil can be used in the north. Prune the flowers when they fall, and control the flowering period in order to make them more beautiful. The cut annual branches can also be propagated by cutting.
Rhododendron leaves are yellow on the front and have red spots on the back, which is harmful to red spiders and will seriously shed leaves. Spray 40% triclosan 1000 times solution every seven days, and spray it for three times continuously to remove it. If the leaves are yellow and the veins are still green, it is a symptom of iron deficiency. & gt
Question 5: What season is the best for pruning azaleas in May? In order to maintain the beautiful appearance of azalea trees, we have to trim too many branches, buds and buds every year. If the height is ideal, pick your feet properly.
Question 6: Rhododendron germinates 5 days after pruning. How long does it take to see leaves in 10 day?
Question 7: How to Prune Rhododendron Rhododendron can be divided into four categories: 1. Rhododendron, also known as Mao Dujuan and Rhododendron macrophylla, is a big variety of Rhododendron in spring. The second is Dong Juan, which belongs to Rhododendron rockii and has the smallest flower pattern, and is listed as a small flower variety of Chunna. The third species is Xia Juan, which blooms in May-June, and is the latest one, so it is called Xia Juan. The fourth species is Rhododendron occidentalis, which is called Rhododendron occidentalis because it is bred in Holland and Belgium in western Europe. Some of them are called Belgian Rhododendron or Four Seasons Rhododendron.
At present, most products on the market are Xi Juan. Xi Juan is an improved variety with large flower pattern, many varieties of colors, long flowering period, good maintenance and few flowers in summer, so it is a very popular variety. It is characterized in that each new branch, regardless of its length, will form a bud when it grows to 150- 170 days, so flowers can be seen all year round, but the most flowers are concentrated in winter and spring.
Rhododendron has a strong ability to sprout new buds and grow long branches, so it should not be allowed to grow wantonly. It is necessary to prune, control and adjust reasonably and maintain a reasonable and beautiful tree shape. Pruning can also prevent unnecessary nutrient consumption and make trees grow vigorously. There are five pruning methods: core removal, bud stripping, bud wiping, branch thinning and short cutting. Generally, it is enough to wipe buds, twigs and cut short.
Brush buds-leave one or two buds on each branch, and wipe off the remaining buds, thus reducing the density of branches. Sparse branches-that is, pruned branches, slender branches, overlapping branches, crossed branches, diseased branches and weak branches. Short-cut-that is, cut short the long branches and the branches that are growing too vigorously, so that they grow wildly, thus making the trees beautiful and improving their ornamental value.
The purpose of pruning is to make the branches sparse, and too many branches and leaves will affect lighting and ventilation, which is not conducive to growth and flowering, and will also attract pests and diseases.
Question 8: How to prune azaleas?
Rhododendron has a strong ability to sprout new buds and grow long branches, so it should not be allowed to grow wantonly. It should be controlled and adjusted by reasonable pruning. Pruning can not only maintain a beautiful tree shape, but also prevent unnecessary consumption of nutrients and maintain the vigorous vitality of the tree.
Pruning methods usually include: core removal, bud stripping, bud wiping, branch thinning and short cutting;
Picking: when the branches grow to a certain extent, remove the top, control the top advantage and promote their germination and branching;
Bud sowing: when there are too many buds, adjust some small buds and side buds to prevent excessive consumption of nutrients and excessive overlapping and crowding of buds, and ensure the flowering quality of main buds;
Bud smearing: The buds on the new branches of Rhododendron are divided into terminal buds and lateral buds, and each bud can produce a Xinsheng Duan branch. According to the direction of buds and the needs of plant type, some buds can be properly erased to reduce the density of branches, which not only avoids excessive consumption of nutrients and excessive weak branches, but also ensures the healthy growth of strong buds.
Sparse branches: The branches of Rhododendron are criss-crossed, and the branches and leaves cover each other, which affects ventilation and light transmission and is easy to breed pests and diseases. Too dense branches, slender branches, concentric branches, cross branches, pest branches, etc. must be properly thinned. Ensure the healthy growth of plants;
Short cutting: Cutting off some branches that are too long and prosperous will control the plant type, and also help the short cut branches sprout new lateral branches, promote the beautiful plant type and improve the ornamental value.
The pruning of rhododendron in small seedling stage is mainly based on coring, that is, coring is carried out every year when the annual branches grow to about 5 cm to promote branching. 2-3 lateral buds will grow on the branches left after core removal, so that after 2-3 years of cultivation, the crown of the plant can be shaped. But don't pull out the seedlings that grow too thin, otherwise it will only weaken the sprouted lateral branches, which is not conducive to future growth. The buds in the small seedling stage should be picked to avoid consuming more nutrients and affecting plant growth. In seedling stage, thinning should be combined, especially for tree species and varieties with many branches, and the over-dense branches, sparse branches and diseased branches in the crown should be cut off in time.
For plants that have formed a certain plant type, they should be pruned after flowering in spring or turning over pots in autumn. After azaleas are in full bloom, their residual flowers often last for a long time, which will only waste nutrition. It is necessary to cut off the residual flowers as soon as possible so that more nutrients can be supplied to new branches and leaves.
For Xia Juan, who has a shorter plant type and more transverse branches, more roots and branches will sprout in spring, which will consume nutrients and disturb the plant type. In order to supply nutrients to the main branches and flowers, these twigs should also be cut off. As for flower buds, it is best to leave 1 big flower per branch and pick the rest. When Mao Juan is used as the rootstock to graft Rhododendron, attention should be paid to removing the budding branches of the rootstock to ensure the normal growth of the upper scion. In addition, the branches should be thinned properly to improve the ventilation and light transmission conditions of the crown, concentrate nutrition and enhance the growth of plants. There is also a third point: cut short the scurrying branches above the crown and the long branches that grow outside the crown to maintain a good plant shape.
Rhododendron buds are planted at the top of branches, and short cutting will make branches flowerless, so you can't use too much. Many new branches will grow near the incision, so it is necessary to screen them in time and remove some branches.
When the growth of adult plants decreases, nutrients can be concentrated through thinning to maintain a certain growth momentum; At the same time, proper shrinkage and shearing are carried out to make the plants sprout strong new branches, or they can be updated after cutting them short by drawing long branches. .
Question 9: How and when to prune potted azaleas? For plants that have formed a certain canopy shape, they should be pruned after flowering in spring or turning over pots in autumn. When pruning:
First, cut off the cute strips. At the base of Rhododendron, many branches often sprout and consume a lot of nutrients, thus affecting the growth of plants and disturbing the tree shape, so it is necessary to erase or cut them off in time. For the plants grafted with Mao Juan as the rootstock, attention should be paid to erasing the buds on the rootstock as soon as possible to ensure the growth of the scion;
Second, we should properly thin branches and cut off all branches that hinder growth and tree shape, so as to improve ventilation and light transmission conditions and concentrate nutrients to enhance growth potential;
Third, the branches above the crown and the long branches that grow out of the air should be cut short to form and maintain a good plant shape.
Question 10: How to prune azaleas 10? First, bud removal. When rhododendron is still a seedling for 2 ~ 4 years, cutting off buds can accelerate the formation of skeleton. It is beneficial to the formation of plant pattern in the future. Second, pruning time. Adult azaleas are usually pruned after flowering. Third, trim long branches. Too many branches will affect the beauty of azaleas and make paper branches grow out of order. Pruning long branches after flowering can control the shape of plants well. Prune thinly, so that the growth shape is good. Fourth, prune the weak branches. If the branches and leaves turn yellow, withered or damaged, they can be cut off. This is conducive to the healthy growth of the whole pot of flowers. Fifth, pruning deformed branches. Deformed branches must be cut off. Failure to trim will affect the growth of healthy branches. Make the appearance ugly.