What to Do When Camellia Drops Its Leaves? Cause Analysis and Treatment Methods

Anyone who loves plants and flowers surely knows the camellia, but growing a camellia well is not so easy. Some growers find their camellias drop leaves very easily. When a camellia drops leaves, the first thing to do is find the cause, and then decide what to do next. Here I have summarized three common causes of camellia leaf drop, so fellow camellia lovers can learn about them together.

Camellia

I. Waterlogging and root rot causing camellia leaf drop

Some growers have not had their camellia long and water it very diligently. Because the pot is large, the soil around the roots stays wet for a long time, which suffocates the roots and causes the camellia's roots to rot, so the leaves drop.

II. Anthracnose

This disease occurs on the leaves of the camellia, mainly on mature or old leaves. The lesions are nearly round or irregular in shape, water-soaked and dark green, and finally turn yellowish brown or reddish brown. Tiny black granular dots form on the lesions. The lesions vary in size, and some can expand to more than 1/2 of the leaf blade, with a yellowish brown raised line at the edge and a clear boundary with the healthy part.

1. Remove dead branches and fallen leaves to eliminate the source of infection.

2. Strengthen cultivation management and apply more organic fertilizer. Weed frequently and irrigate reasonably to enhance the plant's disease resistance.

3. In the early stage of the disease, spray once every half month with an equal-amount 150-fold Bordeaux mixture, a 65% zineb 600-800 fold solution, or a 70% thiophanate-methyl 1000 fold solution, for 2-3 consecutive sprays.

III. Poor ventilation

Some camellia leaf drop is caused by poor ventilation. Especially in winter, being kept indoors for a long time with poor ventilation, stale air, or a room temperature above 20°C can also cause bud and leaf drop.

Why Camellias Do Not Bloom and How to Solve It

Because camellias have large, brilliantly colored flowers and a great many varieties, they can be said to be a favorite of many growers. But some growers often encounter the situation where their camellias do not bloom during cultivation. Here I will analyze the more common causes and solutions for you.

Camellia (detailed introduction)

I. Not repotting for a long time.A camellia that has been grown for several years without growing, and actually getting smaller the longer it is grown, is a problem commonly encountered by many growers, and one very important cause is not repotting for a long time. Camellia roots like good aeration and prefer new soil and rich mud, so it is necessary to repot and change the soil in time and cut off aged roots, which promotes new root growth and makes the camellia grow vigorously. The repotting time for camellias is after flowering in spring. For home growing, repotting and changing the soil at least every other year is necessary, and ideally once every half year, carried out after the new shoots have fully matured. The specific method is: take the camellia out together with the pot soil, use a sharp knife to shave off 1/3 of the pot soil, cut away the aged roots, then put it back in the pot, fill the gaps with pond mud or other new rich mud, and water so the soil is moist and in full contact with the roots.

II. Lack of humidity.Camellias like a humid, cool environment. Dry air and high heat will cause an imbalance in their water status and kill them. Therefore, growing them on a balcony often makes it hard to grow them well because of poor air circulation, a dry environment, and high temperatures when sunlight falls directly on them. To solve this problem, in winter they should be placed in a sunny spot and the leaves sprayed with water frequently so the leaves can breathe. In summer, place the clay pot in which the camellia is grown in a water layer 3 cm to 5 cm deep; only then is it possible for it to produce brilliant flowers.

III. Kept indoors for a long time.When a camellia is in full bloom, it is of course fine to move it indoors to display and enjoy, but keeping it indoors for a long time will cause the branches and leaves to become weak and the leaves thin, so that after being taken outside it cannot withstand strong direct sunlight and is prone to sunscald. Therefore, camellias are best grown on a balcony, but in summer they need shading. When the winter temperature drops below 0°C, they can be moved indoors, but keep them away from heat sources, and on fine days open the windows during the day for ventilation.

IV. Too much fertilizer and water.Camellias are not tolerant of fertilizer. Applying fertilizer too often and too much will cause excessive growth but no flower buds. Therefore, in summer fertilizer application should be controlled as much as possible to strictly prevent burning the roots. If fertilizer really is needed, follow the principle of "prefer dilute to concentrated, prefer less to more, water little but often." The best time to fertilize is on cloudy days or after 5 p.m. Some growers like to use urea as a top dressing, which is very unfavorable for camellia growth. Especially for young camellia seedlings, top dressing with urea will cause leaf drop; excessively high concentrations in particular will cause reverse osmosis and lead to the death of the plant. Late July to August is the camellia's high-temperature dormancy period, and no fertilizer at all should be applied at this time. Throughout its growth and development, the camellia needs a lot of water, but watering should follow the principle of letting the pot soil dry between waterings. If 0.1% ferrous sulfate is added to the water, it can promote vigorous plant growth and deep green leaf color.

What to Do When Camellia Buds Drop? Causes and Solutions for Camellia Bud Drop

Camellias have a graceful form, stay evergreen through the four seasons, and have a relatively long flowering period, making them a traditional ornamental flower in China, so many people place a pot of them in their homes. But during cultivation, camellia buds often drop. What should we do? Today, I will explain the causes and solutions for camellia bud drop.

1. Bud thinning

If there is nothing wrong with the care of the camellia, the cause of bud drop is failing to thin the buds. Some people think more buds is better, but in fact too many buds inevitably disperse the nutrients, causing buds to fall off due to insufficient nutrition.

Solution: Around August, when the camellia buds are about the size of a soybean, thin them in time, keeping only one well-developed bud per branch. Especially on weaker plants, bud thinning must be done in time.

2. Unsuitable soil

Unsuitable soil is also one of the causes of camellia bud drop. The most suitable soil pH for camellia growth is a sandy loam with a pH of 5-6.5. Soil that is too acidic or on the alkaline side, heavy clay soil, saline-alkali soil, and calcareous soil will all make the camellia grow poorly, and certain trace elements cannot be absorbed. A lack of nutrient elements such as phosphorus, iron, and sulfur in the soil will also cause chlorosis and bud drop.

Solution: For camellia bud drop caused by unsuitable soil, spray a 0.2% ferrous sulfate solution every week.

3. Improper watering

Camellias like moisture and dislike waterlogging. If the soil around the roots stays wet for a long time, the roots will suffocate; in mild cases all the buds drop, and in severe cases the plant dies. To keep the buds, the pot soil should be kept appropriately moist but slightly on the dry side. If too dry, the fleshy fibrous roots will dehydrate and die; if too wet, the fibrous roots will suffocate and rot from waterlogging. When the plant cannot get water, it will first drop buds and then drop leaves.

Solution: If the pot soil is already too dry, first water a small amount to gradually moisten the soil, then water thoroughly; otherwise the root tips lose water and cannot adapt to a sudden heavy watering, and the buds are bound to drop. In winter, water only when the soil is about 70% dry, and water with lukewarm water at noon on a sunny day.

4. Unsuitable temperature

Unsuitable temperature is another cause of camellia bud drop. During the winter, keeping the temperature at 3°C-5°C is suitable; above 16°C it will sprout early, causing leaf and bud drop. Below 0°C, the buds will be damaged by freezing. Before flowering, the temperature should not be lower than 5°C-7°C; during flowering, 10°C-15°C is suitable, with a maximum of 20°C. In winter, as long as it is above 2°C, the camellia can keep its buds. Camellias most dislike too great a temperature difference; with alternating high and low temperatures, all the buds will drop off.

Solution: When the temperature drops close to 0°C, move the camellia indoors to a bright spot, cover it with a curtain at night to keep it warm, and pay attention to regulating the temperature of the flower room to give the camellia the most suitable growing temperature.

5. Poor ventilation

Camellia bud drop is sometimes caused by poor ventilation. Especially in winter, being kept indoors for a long time with poor ventilation, stale air, or a room temperature above 20°C can also cause bud and leaf drop.

Solution: While maintaining the most suitable growing temperature for the camellia, also pay attention to ventilation. It can be placed by a window to get a proper amount of air.

6. Fertilizing in winter

Camellias enter dormancy in winter, and fertilizing during dormancy is not suitable. Even a light fertilizer application very easily causes bud drop.

Solution: From early spring until before flowering, the camellia can be given a mixed liquid fertilizer of nitrogen and phosphorus 1-2 times to prevent bud drop, but nitrogen fertilizer should not be excessive. By autumn, sufficient nutrients for flowering should be stored up, so that at flowering time the flowers will be abundant and brightly colored. From September to October, apply a thin fertilizer high in phosphorus once a month, such as decomposed chicken manure, to achieve the goal of strengthening the buds. Stop fertilizing in November, and by no means fertilize during the winter dormancy period.

7. Pest infestation

Camellia diseases include anthracnose, sooty mold, and gray leaf spot, among which anthracnose is the most serious. The main pest is scale insects. When pests or diseases are found, spray promptly for control; otherwise severe bud drop will occur.

Solution: For anthracnose damage, spray an equal-amount Bordeaux mixture or a 25% carbendazim wettable powder 1000 fold solution for control. For scale insect damage, spray a 40% omethoate emulsifiable concentrate 1000 fold solution for control, or wash them off clean.

The above are the causes and solutions for camellia bud drop. I hope they can help you. For more home knowledge, please stay tuned.