Camellia has changed pots for more than a month. Why are the leaves drooping and spotted? How to improve? First, the root system is damaged.
For camellia, the root system is a very important organ, because plants rely on the root system to absorb and transport nutrients to maintain growth. The root system of camellia needs to adapt to the new pot soil, which is often called "pot-supplying period" If the operation is not careful when changing pots, the root system of camellia will be damaged, then the pot supply period of plants will be prolonged, and plants will not be able to grow in pots and absorb enough water and nutrients. When the leaves consume all the stored water, drooping or even spots will appear.
Improvement method: If the root system is damaged, the leaves of Camellia plants droop and spot because they are not in the pot, the subjects can water the roots with carbendazim solution diluted with 1000 times of clear water, or use plant ash extract, which can play a role in sterilizing the roots of plants and promote the roots to recover health.
Suggestions for changing pots: In order to prevent the root system from being damaged, Camellia should be carefully operated when changing pots, and do not pull hard when taking off pots, so as not to strain the root system. In addition, the pruned roots should be disinfected, and carbendazim solution or plant ash can be used. In order to promote the rapid service of plants, some leaves can be trimmed appropriately to reduce the consumption of nutrients and water, and at the same time, water can be sprayed on plants to prevent the leaves from turning yellow and falling off.
Second, the soil is not suitable
Camellia likes loose, breathable and well-drained slightly acidic sandy soil. If the soil is not suitable for changing pots or using alkaline soil, the iron content in alkaline soil will gradually decrease, and iron plays a very key role in chlorophyll synthesis. If there is iron deficiency, chlorophyll synthesis will decrease and leaves will turn yellow. If the soil is not suitable, the plants will grow poorly, and the leaves will droop and grow spots.
Improvement method: If the soil is alkalized, it can be irrigated with appropriate ferrous sulfate solution to keep the soil slightly acidic, and loosen the basin soil with a small shovel. If the situation worsens, it is best to take off the pot to check the root condition, and then mix the soil again for planting.
Soil suggestion: It is difficult for a single soil to meet the demand of camellia. Mixed soil prepared from various soils can be used as the cultivation substrate for camellia pot-changing, such as humus soil, pastoral soil and river sand, and the ratio is 4:2: 1, or peat soil, garden soil and vermiculite are mixed in the ratio of 4:3: 1. In addition, it is best to disinfect the prepared soil before use, so as not to affect the growth of plants because of the eggs mixed in the soil. The soil can be exposed to the sun for 3-5 days or disinfected with boiling water.
Third, there is too much watering.
After changing pots, the root system of camellia is in a weak state and its water absorption capacity is weak. If the soil is watered too often or too much, it will be wet for a long time, and the oxygen content in the soil will be continuously reduced. The root system will not breathe well or even rot due to lack of oxygen, and the deformed root system can not normally transport the water and nutrients needed for plant growth, resulting in drooping leaves and spots.
Improvement method: If camellia leaves droop and spots appear due to excessive watering, then it is necessary to maintain the plants in a well-ventilated place in time, speed up the evaporation of water, and dry the soil as soon as possible to avoid more serious damage to the plants.
Watering suggestion: Camellia after changing pots can be properly watered. The water control here is not to stop watering, but to water according to the dry and wet conditions of the soil, so that it can be watered thoroughly without watering. Before watering, you can insert a wooden stick into the soil for two centimeters. If the stick is dry, water it slowly, so that the water can fully soak the soil, and no water can accumulate.
Fourth, premature fertilization.
As we all know, camellia after changing pots will be in the period of serving pots and will adapt to the new soil to some extent. The root system of camellia in the upper basin stage is weak, and its ability to absorb nutrients is almost zero. If the fertilizer is applied too early, it will not only increase the burden on the root system, but also lead to the continuous accumulation of fertilizer in the soil, resulting in the deterioration of the soil environment, which is not conducive to the growth of the root system of Camellia oleifera, and even cause fertilizer damage to the root system, which will naturally lead to unhealthy leaves.
Improvement method: If camellia is fertilized too early after changing pots, it is necessary to stop fertilization in time and try to dilute the fertilizer in the soil. You can use the method of continuous irrigation with large water, but be careful not to accumulate water, and then put the plants in a well-ventilated place to speed up the evaporation of water.
Fertilization suggestion: Don't rush to fertilize camellia after changing pots. Premature fertilization is not only unprofitable, but also may cause fertilizer damage to plants. Camellia after changing pots need not be fertilized for at least two months. In the later period, we must fertilize camellia thinly and diligently, avoid using thick fertilizer or raw fertilizer, and apply fully decomposed cake fertilizer and water once a month to promote the vigorous growth of plants.
Note: It can be seen from the pictures provided by the subject that there are little red dot on the leaves of plants. This situation may be that camellia is infected with red spider. If there is a red spider, it must be sprayed in time to avoid aggravating the pest. You can spray the leaves with pyridaben, and the leaves with spots can be removed and burned.
Summary: Camellia leaves droop and have spots for more than a month. The common causes are root damage, excessive watering, soil discomfort, premature fertilization and so on. In addition, camellia infection with red spider is also possible. After the leaves of plants have problems, we must find the appropriate reasons in time to deal with them, so as not to cause further harm to camellia plants.