Cultivation and Management methods of Hydrangea and Control of Diseases and insect pests

Hydrangea is a very beautiful plant, and it is the preferred domestic plant variety for many people. Below, the editor will come to talk to you about hydrangea reproduction and flower promotion treatment and pest control cultivation techniques.

1. Breeding technology

Hydrangea is often propagated by cutting, ramet, striping and grafting, which is mainly produced by cutting and can be cut at any time under facility conditions, but in order to make it blossom in early spring, batch cutting propagation can be carried out from August to September. When cutting, the robust twigs on the young mother tree are selected as cuttings, the length of the cuttings is about 15cm, the base needs nodes, the lower leaves are removed, and dipped in the rooting agent treatment solution mixed with mud. The suitable temperature of cutting is 13 ℃ ~ 18 ℃, shade is needed after cutting, it is often kept moist, rooting takes about 20 ~ 30 days, and it can be transplanted in the second year after survival. In the production, the seedlings are usually raised in the matrix, and the substrate is generally selected in the proportion of peat: perlite = 5:1, which is raised in the nutrition bowl of 10cm.

Split-plant propagation can be used for family use, and it is suitable to be carried out before sprouting in early spring. Separate the rooted branches from the mother plant, pot directly, watering should not be too much, maintain in the semi-shady place, wait for new buds to sprout and then transfer to normal maintenance. Striping propagation can be carried out during bud germination, grow after 30 days, cut off from the mother plant in the following spring, transplant with soil, and blossom in the same year. In general, high pressure is carried out from March to April in spring, and it can take root from June to July, and it can be cut off and planted in the same year. Grafting propagation can use Qionghua seedlings as rootstocks, cut in spring, easy to survive. Ramet and grafting are rarely used in large-scale production. Transplanting should be carried out after defoliation or before budding, and pay attention to avoid harming the root system. The main branch is easy to sprout and grow, and it needs to be pruned properly after flowering to shape the tree.

two。 Dwarfing treatment

The dwarf female parent material was selected for cuttage propagation and pruning. The use of dwarf spraying treatment, the use of concentration is 2000ppm, that is, lkg water should add 98% of the original powder about 2.04g. The spraying time of Daizhuangsu is generally carried out 20 days after changing pots, and then sprayed once every 15 to 20 days. The goal of promoting the shortening of plant joints and pot plumpness can be achieved by spraying for 2 or 3 times in a row.

3. Cultivation and management

The suitable temperature for the growth of Hydrangea is 18 ℃ ~ 28 ℃, and the winter temperature is not low and dry 5 ℃. It takes 6 ~ 8 weeks for flower bud differentiation under the condition of 5 ℃ ~ 7 ℃. The temperature of 20 ℃ can promote flowering, maintain 164 ℃ after anthesis and prolong the flowering period. But the heat makes the flowers fade quickly. Hydrangea is a short-day plant, which can form flower buds after dark treatment for more than 10 hours every day and about 45-50 days. Potted hydrangea is commonly used in 15~25cm flowerpots. Potted plants should be fully watered after sprouting in spring to ensure that the leaves do not wither. During the florescence from June to July, there should be sufficient fertilizer and water, and fertilizer should be applied once every other half month. Usually cultivation should avoid the hot sun, and 60% to 70% shade is the best. Proper shading can prolong the flowering period when the light is too strong in midsummer. The stem of the flower is removed after flowering to promote the formation of new branches.

It is better to cultivate Hydrangea with loose, fertile and well-drained sandy loam. However, the flower color is affected by soil acidity and alkalinity, acidic soil flowers are blue and alkaline soil flowers are red. In order to deepen the blue, aluminum sulfate can be applied during bud formation. To keep pink, lime can be applied to the soil. The basin soil should be kept moist, but it should not be watered too much, especially in the rainy season to prevent rotting roots caused by waterlogging. It is better to dry indoor potted plants in winter. The leaves are too damp and perishable. Change the basin once a year in spring. Trim properly to keep the plant graceful.

4. Flowering treatment

The hydrangea potted plants which meet the requirements of vegetative growth were placed in 5 ℃ ~ 7 ℃ non-light cold storage for 45 days in mid-October in winter for low temperature catalytic treatment. After the expiration of the period, the leaves will turn yellow or withered, and then transplanted to the greenhouse for maintenance, it can bloom neatly during the Spring Festival.

5. Diseases and insect pests and their control

The main diseases of hydrangea are wilt, powdery mildew and leaf spot, which can be controlled by spraying 65% Dysen zinc wettable powder 600 times. Pests include aphids, red spiders and blind bugs, which can be sprayed with 1500 times omethoate EC.

The above are the key points of the cultivation and management of hydrangea. Friends who want to plant hydrangea can first pay attention to Huinong net to learn related planting techniques.

Cultivation and pest control of eight Immortals (scientific name: Hydrangea macrophylla), also known as hydrangea and Ziyang flower, belongs to the genus Saxifragaceae. The eight Immortals flowers are white and plump, large and beautiful, and their colors can be red and blue, pleasing to the eye and spirit. They are common potted ornamental flowers and trees. The eight Immortals were cultivated earlier in China, and they were planted in the gardens in the south of the Yangtze River built in the Ming and Qing dynasties. The parks built at the beginning of the 20th century are also inseparable from the planting of eight Immortals. Modern parks and scenic spots are planted in pieces to form a landscape.

The eight Immortals, also known as Hydrangea, originated in China and Japan. Like warm, humid and semi-shady environment, not cold-resistant, the aboveground withered in winter, the next spring re-germination of new branches, with fertile, well-drained sandy loam soil is better. Culture: commonly used ramets, striping and cutting culture. The ramet was carried out before germination in early spring, and the top shoots were cut and rooted 2 weeks after insertion. Cultivation: pay attention to fully watering after sprouting in spring to ensure that the leaves do not wither. During the flowering period from June to July, fertilizer and water should be adequate, fertilizing once a month, and applying phosphate fertilizer 1-2 times. Potted plants can be properly shaded and the flowering period can be prolonged. The stem of the flower is removed after flowering to promote the formation of new branches. Flower color is affected by soil acidity and alkalinity, acidic soil flowers are blue, alkaline soil is red. Diseases and insect pests: mainly wilt disease, powdery mildew disease and leaf spot disease harm, with 65% Dysen zinc wettable powder 600 times liquid spray control. Insect pests are harmful to aphids and bug bugs and can be sprayed with 1500 times of omethoate EC. Application: the flowers of the eight Immortals are white and plump, large and beautiful, and their colors can be red and blue, pleasing to the eye and spirit. In the landscape, they can be arranged under the forest, by the pool and next to buildings, and can also be decorated with flower beds and potted plants. Matters needing attention in cultivation, management and culture of hydrangea

Hydrangea is known as ball orchid, also known as eight Immortals, Ziyang Flower, Seven changes, Hydrangea, Noodle Flower, originated in Sichuan, China and Japan. It is a deciduous shrub of Hydrangea of the family Hydrangea of Cornus. The flowers are almost asexual, and the so-called "flowers" are just sepals. The eight Immortals were cultivated earlier in China, and hydrangea was planted in the gardens in the south of the Yangtze River built in the Ming and Qing dynasties. The park built at the beginning of the 20th century is also inseparable from the planting of hydrangea. Modern parks and scenic spots are planted in pieces to form a landscape. Artificially cultivated hydrangea flowers are colorful, with blue, white, purple, pink, pink and other colors, is a common ornamental flowers and trees.

Growth habits of Hydrangea

We must first understand the growth habits of hydrangea before we can pertinently master the breeding methods of hydrangea. Hydrangea is native to the Yangtze River Basin in China and is fond of warm, moist and semi-shady environment. Afraid of drought and waterlogging, it is not cold-resistant. In cold areas, the aboveground parts wither and die in winter, and new shoots will not sprout again until the next spring. Hydrangea likes the light loam which is fat, moist and well drained, and has strong adaptability. The acidity and basicity of the soil had a great influence on the flower color of hydrangea, which was blue in acidic soil and red in alkaline soil.

Propagation method of Hydrangea

Cuttings, ramets, striping and grafting are commonly used for propagation, mainly cuttings. During the Meiyu period, strong twigs on young mother trees can be selected as cuttings, with nodes at the base of cuttings, stained with mud, about 20 cm long, and the lower leaves can be removed. The suitable temperature of cuttings is 1 3-18 ℃, shade is needed after cutting, it is often kept moist, rooting takes place in about 15 days to 1 month, and can be transplanted in the second year after survival. Ramet propagation should be carried out before sprouting in early spring. Separate the rooted branches from the mother plant, pot directly, watering should not be too much, maintain in the semi-shady place, wait for new buds to sprout and then transfer to normal maintenance. Striping propagation can be carried out during bud germination, grow after 30 days, cut off from the mother plant in the following spring, transplant with soil, and blossom in the same year. In general, high pressure is carried out from March to April in spring, and it can take root from June to July, and it can be cut and planted in the same year. Grafting propagation uses Qionghua seedlings as rootstocks, cutting in spring, easy to survive. Transplanting should be carried out after defoliation or before budding. The main branch is easy to sprout and grow, and it needs to be pruned properly after flowering to shape the tree.

Cultivation and Management of Hydrangea

The optimum temperature for the growth of Hydrangea is 18-28 ℃, and the winter temperature is not lower than 5 ℃. Flower bud differentiation takes 6-8 weeks under the condition of 5-7 ℃. The temperature of 20 ℃ can promote flowering, maintain 16 ℃ after anthesis, and prolong the flowering period. But the heat makes the flowers fade quickly. Hydrangea is a short-day plant, which is treated in the dark for more than 10 hours every day and forms flower buds in about 45-50 days. Potted hydrangea is commonly used in 15cm pots. Potted plants should be fully watered after sprouting in spring to ensure that the leaves do not wither. During the florescence from June to July, there should be sufficient fertilizer and water, and fertilization should be applied once a month. Usually cultivation should avoid the hot sun, and 60%-70% shading is the best. When the light is too strong in midsummer, proper shading can prolong the flowering period. The stem of the flower is removed after flowering to promote the formation of new branches.

The sandy loam with loose, fertile and well-drained soil is better. However, the flower color is affected by soil acidity and alkalinity, acidic soil flowers are blue and alkaline soil flowers are red. The basin soil should be kept moist, but it should not be watered too much, especially in the rainy season to prevent rotting roots caused by waterlogging. It is better to dry indoor potted plants in winter. If it is too wet, the leaves will rot easily. Change the basin every spring. Trim properly to keep the plant shape beautiful.

Upper pot pruning of hydrangea

The propagation of hydrangea is carried out in spring and autumn, but it is the best in late spring and early summer (from the end of April to July). At this time, the hydrangea flowering period has basically ended in May, and new branches and leaf buds have grown after picking and pruning the leaves of the remnant flowers. at this time, the top branch and bud can be cut as cuttings. Cutting can also be carried out from late September to October, and many new branches and leaf buds will sprout after pruning the terminal buds of Hydrangea in early spring, and it is suitable for cutting propagation because of the cool weather.

1. In addition to the nursery bed made of brick, in order to facilitate moving and management, the foam box can be used as the seedbed. Cut a few holes at the bottom of the box and cover it with tiles, fill it with a layer of coarse sand and then put it into the culture soil (3 parts of sand and 2 parts of aseptic mountain soil), flatten it and cut it. Cut the cuttings into 10-15 cm segments, cut off the lower leaves of the terminal branches, leaving only the top 2-3 leaves. After cutting, tie up the cuttings. In order to make the cuttings heal and take root as soon as possible, soak the cuttings with a strong rooting agent (about 0.2 kg per packet of water) for 5 minutes and 10 minutes. After cutting, the soil around the branches should be pressed tightly with your fingers to make the cuttings closely combine with the soil. Then use a sprinkler to water once, as long as the bed soil is wet, there is no need to water, but to often spray on the cuttings leaves and keep the environment around the seedbed moist. If the weather is hot and sunny, shade should be built. In this way, under careful management, the wound began to heal for about 25 days, and new roots grew on the branches.

2. Pot cultivation and maintenance: Hydrangea has survived after about 25 days of careful management, and new leaf buds grow upward from the terminal bud, which must be separately planted and managed in pots. For the cultivation of hydrangea, the coniferous soil (with high acid content) is added with bran, and the compound fertilizer of nitrogen, phosphorus and potassium (according to the content of coniferous soil) is mixed and accumulated with the soil for more than half a year, and it can be used after opening and drying for several days before use. After the seedling survives, the top branch can be topped for the first time to promote the lower part to sprout new leaf buds: when several branches and buds grow to a certain length, top for the second time, and let their growth balanced and luxuriant, when the trunk is strong, only 3 or 4 branches are left to grow. During the period from pot survival to branch setting, it is necessary to apply fertilizer for 3 to 4 times, and the fertilizer is mainly potassium dihydrogen phosphate.

Disease and pest control of Hydrangea

1. The main diseases and insect pests of hydrangea are wilt, powdery mildew and leaf spot, which can be controlled by spraying 65% zinc wettable powder 600 times.

2. Insect pests are harmful to aphids and bug bugs, which can be sprayed with 1500 times omethoate EC.

Matters needing attention in the Culture of Hydrangea

1. Hydrangea is toxic, and accidentally eating the stems and leaves of hydrangea will cause colic, abdominal pain, diarrhea, vomiting, urgent inhalation, hematochezia and so on. In everyone's imagination, hydrangea is as edible as marshmallows and buns, but in fact, once you eat hydrangea, abdominal pain occurs a few hours later. other typical symptoms of poisoning include skin pain, vomiting, weakness and sweating, as well as reports of coma, convulsions and a breakdown of blood circulation in the body. Fortunately, an antidote for hydrangea poisoning has been developed. In addition, it should be noted that hydrangea is easy to cause allergies, generally not recommended in the bedroom. It is suggested that flower friends had better vary from person to person when planting flowers, choose flowers that they like and are harmless, do not grow too many flowers indoors, and pay attention to maintaining good ventilation.

2, hydrangea culture should pay attention to watering properly, the Beginning of Spring must let hydrangea have rain and dew, sunshine, water sooner or later.

The flowery language of hydrangea

Hope: Hydrangea, native to the Mediterranean, has always been famous for its evergreen trees that bloom in the depths of winter. In the cold winter, at first glance, pink buds and white flowers seem to tell people that spring is approaching. Therefore, the flower language of hydrangea is-- hope. Those who are blessed by these flowers are full of patience and tolerance. He will bring hope to many people, and his life is also very rich.

2. Loyalty and eternity: refers to the eternity of loyalty to love and mutual affection. The flower language of blue hydrangea is romantic and happy.

3, happy, reunion: hydrangea round flowers, beautiful posture symbolizes the continuous contact with relatives, no matter how long apart, will be together again.