How to raise the latest potted mulberry flowers?

Hibiscus flower scientific name hibiscus, also known as red hibiscus, safflower, champion red, etc., for Malvaceae hibiscus evergreen shrub plants, origin for China, in ancient times is a popular ornamental plants, flowers big color Yan, four seasons open, mainly for garden use, in the world especially tropical and subtropical areas have more planting, let's take a look at potted hibiscus flowers how to raise it!

Growth Habits of Hibiscus

Hibiscus hibiscus is a strong positive plant. It likes warm and humid nature. It requires sufficient sunlight. It is not tolerant of shade. It is not cold and dry. It can only be potted in the Yangtze River Basin and northern areas of China. It can overwinter at 12~15℃ in greenhouses or other protected areas. When the room temperature is lower than 5℃, the leaves turn yellow and fall off, and when the room temperature is lower than 0℃, they are frozen. Resistant to pruning, strong hair branches. It can adapt to a wide range of soil, but it grows best in slightly acidic loam rich in organic matter and pH 6.5 ~ 7.

Propagation method of hibiscus flower

1, cuttage: usually in May to October, winter in the greenhouse, but the survival rate is high in the plum season. The best cuttings are annual semi-lignification, 10 cm long, cut off the lower leaves, leave the top leaves, cut flat, insert in the sand bed, keep high air humidity, room temperature is 18~21℃, root 20~25 days after insertion. The rooting period can be shortened by treating the base of cuttings with 0.3~0.4% IBA for 1~2 seconds. When the root length is 3~4 cm, transplant it into the pot.

2, grafting: usually in spring and autumn, mostly used for cutting difficulties or slow rooting of Fusang varieties, especially cutting survival rate of low double-petal varieties. Branches or buds can be grafted, rootstock with a single flower hibiscus, grafted seedlings that year shoot flowering.

Cultivation method of hibiscus flower

1. Light: Hibiscus hibiscus is a positive tree species. It should be moved outdoors in early May and placed in a sunny place. If the light is insufficient, the buds are easy to fall off, the flowers shrink, and the sunshine should not be less than 8 hours a day.

2, fertilization: hibiscus flower growth season on fertilizer demand, every 7 to 10 days to apply a thin liquid fertilizer.

3, watering: hibiscus flower growth period watering should be sufficient, can not lack water, can not be waterlogged, usually watering once a day, Futian can be once in the morning and evening. The ground is often watered to humidify and cool down, preventing young leaves from dying and flowers from falling early.

4. Overwintering: hibiscus flowers are moved into greenhouses after cool days at the end of October, and the temperature is kept above 12℃. After autumn, management should be cautious, and attention should be paid to less fertilization in the later period to avoid autumn shoots. Autumn shoot tissue tender, cold resistance weak, cold weather will suffer freezing injury.

5, pruning: hibiscus flowers can be trimmed before and after the early spring out of the house, each branch except the base to leave 2~3 buds, the upper part of all cut, pruning can promote the hair of new branches, growth will be more vigorous, plant shape is also beautiful. After pruning, due to the reduction of consumption of aboveground parts, water and fertilizer should be properly controlled.

6, change pots: hibiscus potted soil should be loose, fertile sandy loam, every early spring in April before moving out of the outdoor, should be changed pots. When changing pots, replace them with new culture soil, cut off part of the dense curly fibrous roots, apply sufficient basal fertilizer, and add phosphorus fertilizer slightly at the bottom of the pot.

Control of diseases and insect pests in hibiscus hibiscus

1. Leaf spot disease

[Hazard] Most of them occur in the cold weather period at the end of autumn, especially in the northern region. The initial symptoms are pale yellow and red yellow spots on the leaves, round or oval after the enlargement of the spots, black particles can appear on the spots under humid conditions, that is, conidia of pathogenic bacteria, and the leaves dry and fall off in the later stage.

[Prevention and control] The key to prevention and control is to do a good job in cold protection. Protective measures should be taken when the wind cools down after autumn. On this basis, timely spraying 500~800 times of zinc or 1500 times of ammonium can play a very good role in prevention and control.

2. Stem rot

[Hazard] It occurs mostly in rainy season, and the disease is serious under high temperature and rainy conditions. Pathogens mostly infected from the intersection of rhizomes of plants, the initial symptoms are not very obvious, only the cortex of the affected parts shrinks, slightly dark brown, but the subcutaneous tissue has begun to rot, turning brown, the disease spots around the stem after a week, the plant dried up and died. From the leaf surface, at the initial stage of the disease, the leaves wilted, the edges appeared yellow-brown withered spots, gradually expanded inward, and the leaves withered and fell off at the later stage.

[Control] The key to control is to prevent heavy rain from washing plants for a long time, and to dry them with 200~500 times solution of Topzin every 10 days before and after the rainy season. The experiment shows that this method has good control effect.

3. Root knot nematode disease

[Harm] Rootknot nematode disease is also a widely distributed and serious disease. Observed from the ground, the leaves grew weakly in the early stage, and reddish-brown withered spots appeared on the edges. And inward expansion, late leaves dry off. Observed from underground part, it was found that large and small nodules appeared among the roots of plants, smooth flesh color in the early stage, rough brown in the late stage, and pear-shaped female nematodes with needle tip size were hidden.

[Prevention] Prevention is more difficult. If the number of plants is small, the soil must be exposed for a long time, and the old soil should not be reused. More plants can also be applied to aldicarb granules, which can be buried in about 0.5 g in 5-inch pots.