What about the yellowing of camellias leaves? the causes and solutions of camellias losing leaves

Spring is also the season for camellias to bloom. In the layers of green leaves are covered with delicate camellia flowers, petals overlap, wrapped in yellow stamens, emitting a faint fragrance. White is as pure as an angel in the forest, red is charming and moving like a dancing girl, but we will also encounter camellias and leaves turn yellow, so how do we deal with it?

What if the leaves of camellia turn yellow?

Although camellias are evergreen plants, the leaves will not fall off during breeding, but the leaves will still be changed. during the period from April to May, some of the old leaves of camellias will turn yellow and then fall off. this is a normal metabolic phenomenon.

Camellias like semi-shade, avoid the scorching sun; like air humidity, avoid drying; like fertile and loose slightly acidic soil (PH5.5 is more suitable). If the growth is poor in alkaline or poorly drained soil, the leaves are easy to yellowed and fall off, or even die. Camellia likes warm climate and is slightly cold-tolerant. The suitable temperature for growth is between 18 ℃-24 ℃, not less than 0 ℃. Usually pay attention to increase the surrounding air humidity and maintain ventilation, camellias avoid high temperature and muggy environment. Do not put it in a place where the light is too strong. The basin soil should always be kept moist. When watering, it is best to add 0.1% ferrous sulfate to adjust the pH of the soil.

The cause and solution of Camellia Leaf loss

Camellia like warm and humid climate, avoid the scorching sun, like the scattered light of semi-shade, but also bear shade. It is slightly cold-tolerant, and the general variety can withstand low temperature and heat tolerance of-10 ℃, but the growth is inhibited when it exceeds 36 ℃. Like the high humidity of the air, avoid drying. Like fertile, loose slightly acidic soil.

Among them, the soil is loose, fertile, strong water permeability, strong air flow, good ventilation environment, are particularly important conditions.

Then, the balcony environment, itself and the growth habits of camellias are quite different and need to be improved.

1. Enhance ventilation

This is one of the difficulties in planting flowers on the balcony. It is difficult to grow camellias well in a closed balcony. Open balcony, camellias should be placed in the air convection, higher place. When it is continuous and muggy, a small fan can be used for manual ventilation.

2. The soil is loose and fertile

It is relatively simple to use sandy loam or rotten leaf soil. You can go under the trees, in the flower bed, dig the floating soil on the surface, and then add about 1/3 of the net river sand (sea sand can not be used because it contains salt and alkali). Fertilizers can be used with organic granular compound fertilizer, rotten rice panning water, or directly bury a little fish and shrimp in the flower soil.

3. Watering

Camellia taboo stagnant water, waterlogging. After you use loose soil, you can't water too much. To master the principle of seeing dry and wet, it is better to be dry than wet. Especially in the period of new leaves and buds, as well as the gestation of buds and flowering, if long-term waterlogging, it is easy to lose leaves, branches withered, buds.

At the same time, the basin soil can not be completely dehydrated. If the leaves are dehydrated continuously for several days, the leaves can not recover in time after wilting, which will also lead to death.

4. Lighting

Never accept all-day sunshine, especially in the hot and scorching sun season.

Growth habits of Camellia

Camellia fear the wind and enjoy the sun, high terrain, good ventilation, warm and moist, good drainage, loose and fertile sandy loam, loess or humus. PH5.5-6.5is the best. The optimum temperature is between 20-32 ℃, stop growing when the temperature is above 29 ℃, and the leaves will be anxious at 35 ℃, which requires a certain temperature difference. The environmental humidity is more than 70%, and most varieties can withstand the low temperature of-8 ℃ (natural overwintering, Yuncha is slightly less resistant to cold). In the south of Huaihe River, it can generally survive the winter and like acid soil, and requires good air permeability.

The root hair is developed and can usually be cultivated with a mixture of peat, sawn wood, laterite, humus, or above. Camellias can not be shaded in spring, autumn and winter, and 50% shading can be used in summer.

Propagation mode of camellia

There are many propagation methods of camellia, both sexual reproduction and asexual reproduction can be used, among which cutting and grafting are the most common.

Cuttage

This method is the most simple and convenient, and the most suitable cutting time is in September, and it can also be in spring. Select the well-growing, semi-lignified branches, remove the basal leaves, retain the upper 3 leaves, cut them into an oblique orifice with a sharp knife, immediately soak the incision in 200-500ppm indolebutyric acid for 5-15 minutes, then insert it into a sand basin or vermiculite basin after drying, water the wound for about 40 days, and take root for about 60 days. The cuttings treated with hormone took root 2-3 months earlier than those without hormone. Vermiculite is used as a slotting bed, and it takes root much faster than a sand bed.

Lean on the connection

Choose appropriate varieties such as tea or Camellia oleifera as rootstocks to pick up valuable camellias. The connecting time is usually between Ching Ming Festival and the Mid-Autumn Festival. First plant the rootstock in the flowerpot, cut off about half of the joint with a knife, the incision should be smooth, then make the cut of both sides closely fit, wrap it with plastic film, drench the rootstock twice a day, and heal after 60 days. At that time, it can be cut off and planted in the shade of trees to avoid direct sunlight. In February of the following year, the tail of the rootstock was cut off with a knife and then planted.

Leaf cuttings

The leaf cuttage method is generally used for camellia propagation, but some valuable varieties are also used because of the limitation of the source of branches or considering that the tree shape will be affected after sampling. Using mountain mud as the cutting substrate, it can be mixed with 1 stroke 3 river sand to facilitate ventilation and drainage, and the matrix is stored in a tile basin, and then cut in the basin. Leaf insertion is best carried out in the rainy season, take one-year-old leaves as leaf insertion material, too old is not easy to root, too young and easy to rot. Insert about 2 cm into the soil, press the soil after insertion, pour enough water, and then put it in a cool and ventilated place. Generally, it can take root in 3 months, and it can sprout and branch in the next spring.

High insertion

The most important feature of the high-altitude cutting method is that it can give new life to all the weak twigs that should have been trimmed off from the camellias. And this method has the advantages of high survival rate, quick rejuvenation and early flowering. The method is as follows: the thin branches that need to be pruned are girdled in an appropriate position. (generally, the upper part can be left into 15-25 cm branches) the girdling length can be between 5-8 mm, and the plastic film of appropriate size is bound. The film is filled with peat soil or rotten leaf soil that has been sterilized, and after 7-10 days, the lower part of the plastic film is peeled again for 5-8 mm, which is called double-ring peeling high insertion method.

Tree grafting

Camellia is a plant that is difficult to survive. There are a variety of propagation methods of camellia, among which grafting is the most commonly used. Grafting propagation of camellias has many advantages: it can maintain the excellent characters of varieties; it can accelerate plant growth, make it take shape quickly, and can be produced on a large scale; saving panicles, especially for those rare varieties with few sources of panicles, is particularly important; Camellia grafting technology: the grafting time is between June and July, when the new shoot leaves of camellia scion have been unfolded, and the temperature is high, the grafting wound heals quickly and the survival rate is high. The grafting method is the cutting method in the grafting method. Due to the high position of grafting, it is often called "high grafting head".

When the camellias bloom from a distance, the dense leaves are dotted with small camellias, the red camellias are like red fireballs, and the Baishan camellias are like white clouds. These camellias are in full bloom, bringing us infinite spring. I think after reading this article, I have a new understanding of the conservation of camellias. May your camellias blossom the most beautiful flowers every year.