Feeding methods and precautions of hibiscus, hibiscus is a very beautiful flower, mainly safflower, with high ornamental value, and it has many effects and functions, so let's take a look at the feeding methods and precautions of hibiscus.

Propagation methods and precautions of hibiscus 1 hibiscus (basic knowledge);

The best propagation time: cutting propagation of hibiscus is from May to 65438+ 10, and grafting propagation is in spring and autumn.

It is best to plant soil: Fusang can adapt to all kinds of soil, but fertile and loose slightly acidic soil is the best.

Humidity requirements for growth: Fusang ground is often sprayed with water to humidify and cool down to prevent young leaves from burning and flowers from falling off prematurely.

Optimum growth temperature: the optimum growth temperature of hibiscus is 15 ~ 25℃, and in June 10 ~ March of the following year 13 ~ 18℃.

Optimum growth light: Fusang is a strong positive plant, and it needs enough light to grow and bloom normally during the growing period. If the light is insufficient, the flower buds are easy to fall off, the flowers are small and the color is dim; But when the sun is too strong, plants will burn, so it is necessary to protect them moderately.

Matters needing attention in hibiscus culture:

Fertilization: early May is the growing season of Fusang, so it is necessary to strengthen fertilizer and water management and apply dilute liquid fertilizer every 7 ~ 10 days.

Key points of watering: during the growth period of Fusang, the water should be sufficient, and there should be no water shortage or waterlogging. Usually, it should be watered once a day, and it can be watered once in the morning and evening in dog days.

Pruning essentials: Fusang needs pruning when it is cultivated, which can not only enhance the ornamental value of its shape, but also avoid the occurrence of various pests and diseases. When pruning, all branches can be cut off except 2 ~ 3 buds at the base. After pruning, water and fertilizer should be controlled moderately.

Changing pots: There are three things to do when changing pots: First, put in new nutrient soil; The second is to cut off some fibrous roots that are too dense and curly; The third is to apply plantar fertilizer and slightly add phosphate fertilizer to the pelvic floor. In order to maintain a beautiful tree shape and a large number of flowers, according to the characteristics of strong germination ability of hibiscus, pruning and shaping can be carried out before and after leaving the house in early spring. Except for 2 ~ 3 buds at the base, all the upper branches were cut off. Pruning can promote the growth of new branches, which will be more vigorous and the plant shape will be more beautiful. After pruning, water and fertilizer should be controlled appropriately because the consumption of aboveground parts is reduced.

Key points of propagation: Fusang is propagated by cutting or grafting.

1, cutting. From may to 65438+10, it is in the greenhouse in winter, but the survival rate is high in rainy season. The annual semi-lignified cuttings are the best, the length is 10 cm, the lower leaves are cut off and the upper leaves are left, the incision should be flat, the cuttings should be inserted in the sand bed, and the air humidity should be high. At room temperature 18 ~ 2 1℃, the cuttings take root 20 ~ 25 days after insertion. Treating the cutting base 1-2 seconds with 0.3 {BF} ~ 0.4 {BF} indolebutyric acid can shorten the rooting period. When the roots grow to 3 ~ 4 cm, transplant them into pots.

2. Grafting. In spring and autumn. It is mostly used for hibiscus varieties with difficult cutting or slow rooting, especially for double-petal varieties with low cutting survival rate. Branch grafting or bud grafting can be used, and single-petal hibiscus flower is used as the rootstock. Grafted seedlings bloom in the same year.

Pest control: Fusang has the following diseases and control methods.

1, leaf spot. The key to prevent and control the disease is to do a good job in cold protection and take protective measures when the wind cools down after autumn. On this basis, spraying 500 ~ 800 times of zineb or 1500 times of {bf} ammonium in time can have good control effect.

2. Stem rot. The key to prevent the disease is to prevent plants from being washed by heavy rain for a long time, and to dry them every 10 day before and after the rainy season with 200 ~ 500 times liquid thiophanate. Experiments show that this method has good control effect.

3. Root-knot nematode disease. This disease is difficult to prevent and treat. If the number of plants is small, you can change the soil. The soil must be exposed to the sun for a long time, and the old soil should not be used again. More plants can also be treated with aldicarb granules, and about 0.5g can be buried in a 5-inch pot.

Experience in raising hibiscus;

1, Fusang is not frost-tolerant, so it must be moved indoors to keep warm after the first frost and before beginning of winter. The overwintering temperature shall not be lower than 5℃ to avoid freezing injury; Not higher than 15℃, so as not to affect dormancy. Poor dormancy leads to poor growth and flowering in the following year.

2, potted hibiscus, usually out of the house in April, change pots before leaving the house, moderate shaping and pruning, to keep the crown beautiful.

Breeding methods and matters needing attention of furong 2. Breeding method of hibiscus flowers

1, soil

Hibiscus doesn't have strict requirements on soil, but it grows best in fertile, loose and well-drained soil, so we can choose some humus-rich garden soil, humus-rich soil and sandy loam to make them grow stronger and bloom more brightly. It should be emphasized that hibiscus flowers are suitable for planting in slightly acidic soil, and alkaline soil cultivation will lead to poor growth.

2. Lighting equipment

Hibiscus likes to grow in sunny environment, but it is also a little shade-tolerant, but it cannot be cultivated in dark places for a long time, so we can cultivate it in open places such as courtyards or sunny balconies. Indoor cultured hibiscus flowers need enough scattered light, otherwise it will lead to problems such as sparse leaves, few flowers and thin branches.

3. Temperature

Hibiscus flowers like to grow in a warm and humid climate. It is not frost-tolerant, and grows well in the open air in areas where the average day and night temperature is above 10℃. So it is often cultivated in the south, but it needs to be put in a greenhouse in the north.

Step 4: Moisture

Generally speaking, hibiscus flowers do not need to pay too much attention to water supply, especially in the southern region, and can be naturally stocked. Potted hibiscus flowers need watering, and the principle is that they must be watered thoroughly without watering. This watering method should be followed regardless of spring, summer, autumn and winter. Too much water can easily lead to root soaking and root rot, but without water, potted hibiscus flowers will have problems such as soft leaves, yellowing, dryness and deciduous leaves. As for how often to water, it is necessary to observe the dryness and wetness of the basin soil according to different seasons before watering.

5, fertilization

The demand for nutrients of hibiscus flowers is not obvious, but in order to promote its blooming in four seasons, it is advisable to apply fertilizer in Ying Qin with a small amount at a time. Sparse and diligent application can enhance its growth ability, promote its strong branches, improve its ability to resist pests and diseases and safely overwinter.

In early spring, you can use compound fertilizer or nitrogen fertilizer for irrigation, and when you see fast-growing buds, you can appropriately increase some phosphorus and potassium fertilizers to make the buds grow stronger. For normal non-flowering maintenance, we can also use some potassium dihydrogen phosphate to water or spray, which can make the leaves green and strong.

However, it should be noted that we will stop fertilizing it in 10 to avoid excessive growth and flowering at this time, which is not good for hibernation, so we still have to let it bloom enough.