What is the culture method of keel flower? What's with the yellowing of the leaves?

The dragon bone flower, also known as Bawang flower, sword flower, seven-star sword flower and so on, is a plant with strong vitality. Many people raise it at home, which not only adds a lot of vitality to the home, but also purifies harmful gases such as formaldehyde, benzene, radon, ammonia and so on. So what is the culture method of keel flower? What's with the yellowing of the leaves?

First, how does the leaf of keel flower turn yellow?

1. Normal cause

The keel flower will cause its leaves to turn yellow because of a variety of factors. first of all, the keel flower will appear the leaf yellowing phenomenon when the leaves fall, usually during the falling leaves of the keel flower, when the leaves turn yellow is a relatively normal phenomenon. we just need to remove the yellowing leaves.

2. Improper watering

The second phenomenon is that we may water the keel flower too much, which will make the root of the dragon flower stagnant, affect the nutrient absorption of the root system, and cause the root to rot, thus the phenomenon of yellow leaves will appear. Once this happens, the watering needs to be stopped immediately. The keel flower will go dormant in winter, which is not suitable for too much moisture. It is OK to water it once a month or two. In spring, a thorough watering is enough every half a month. The amount of evaporation in summer is relatively large, and it is necessary to water it once every day in the morning and evening, so as to avoid the occurrence of yellow leaves.

3. Unreasonable lighting

The third reason may be due to the problem of light, the intensity of light will affect the leaf color of keel flower, in summer, the sun is relatively strong, usually we need to take shading measures to avoid being damaged by strong light. The sun is relatively weak in winter, so it is necessary to light properly to promote the leaves of keel flowers to grow better, which can be put in front of the window or under the balcony.

4. Inappropriate fertilization

The fourth reason may be in the management of the dragon bone flower, caused by too much fertilization, the dragon bone flower fertility needs can be met in a small amount, generally in its vigorous growth period, once a month will be able to grow healthily.

5. Diseases and insect pests

The last reason is that the leaves of Dragon Bone Flower may be damaged by diseases and insect pests, resulting in this phenomenon, we can use antimicrobial agents for irrigation, can effectively prevent the invasion of diseases and insect pests.

Second, what is the breeding method of keel flower?

1. Reproduction

The propagation of keel flower is often used by cutting method, which can cut the full or older stem nodes in the growing season, dry them for 2 to 3 days, insert them in the sand bed or soil, and take root in about 1 month. When the root is 3 to 4 cm long, it can be transplanted to a small pot or directly planted in the open field. It can be carried out from spring to autumn, but spring and summer is the most suitable. Choose a stout, plump stem with a length of 20cm to 30cm, cut it off and leave it in a cool and dry place for a few days. Insert into the substrate after drying. After keeping the substrate moist, it took root after 20-40 days, and the survival rate was very high. Cutting is not suitable when the temperature is lower than 15 °C. the high temperature and wet incision is easy to rot, while the low temperature is not easy to take root.

2. Planting

The keel flower can be planted in the area with an average annual temperature of more than 20 ℃, with a row spacing of 2.5m x 3m. There should be pillars at the planting site, and 3 or 4 seedlings can be planted next to each post. Potted plants can be planted in other areas, and the pots should be large, with a caliber of 25 cm and 35 cm, with 2 seedlings per pot. Longguhua likes acid sandy loam which is fertile, loose and well drained. Pot cultivation soil can be made of a mixture of rotten leaf soil and coarse sand and a small amount of rotten chicken manure or cow manure.

3. Lighting

Keel flowers like light, avoid scorching sun exposure, May to September should be given shade. It should not be shaded when viewing flowers and fruits. Insufficient light will cause overgrowth of plants and affect flowering and fruiting, but the strong sunlight around noon should be covered, and sufficient sunshine should be given from October to April of the following year.

4. Temperature

The dragon bone flower likes to be warm, and the optimum temperature for growth is 20: 30 ℃. Not cold-resistant, less than 1 ℃, the keel flower will turn yellow due to cold injury. When the temperature is lower than 5 °C, the stem nodes are easy to rot, and the temperature should be maintained above 12 ℃ in winter. The keel flower is heat-resistant and can bloom normally under the condition of high temperature in summer.

5. Watering

Keel flower resistant to drought, afraid of impregnation, during the growth period should keep the basin soil moist, but not stagnant water, otherwise it is easy to cause rotten roots. If rotten roots are found, remove the basin immediately and cut off the rotten parts with a sharp knife until they are healthy. Put the keel flower in a dry and cool place for several days, wait for the wound to dry and replant. Watering should be controlled in winter, as long as the basin soil is slightly moist.

6. Fertilization

Basic fertilizer should be applied before the growth of keel flower, and fertilizer should be applied once every semimonthly during the growing period. Nitrogen should be the main fertilizer in the early stage of growth, and potassium should be used in flowering and fruiting. It is best to use organic fertilizer to fertilize fruit pot plants, which can improve the quality of fruit. Fertilization is stopped in winter.

7. Turn the basin

The keel flower turns the basin once every 1 or 2 years, and the old root should be cut short when turning the basin. If the root has nodules of different size and rough surface, it means that it has been harmed by nematodes and the damaged part should be cut off. The keel flower should be placed in a cool place after root cutting, and then planted and watered after the wound is dried, and the cultivation substrate should be disinfected.

8. Pruning

When the keel flower is used as an ornamental fruit, the plant should be shaped and pruned, generally leaving 3 branches per plant. If there are 2 plants in a pot, it is appropriate to leave 5 branches and cut off too many branches. During the blooming period, too many buds should be removed, only 1 or 2 buds should be kept on each branch, and the thinning time should be controlled within 8 days after budding. After the end of the keel flower production season, the branches hanging to the ground, the over-dense branches and the fruiting old branches should be cut off to facilitate the renewal and ventilation of the branches.

9. Pest control

Dragon bone flower has diseases and insect pests such as stem rot, gray mold, rot, nematode disease and shell insects. When the plant is frozen or subjected to other injuries, it is easy to suffer from rot, which leads to stem rot.