What should I do if the newly transplanted seedlings have curled leaves and turned yellow?

1. Were the roots damaged when transplanting? If so, add some carbendazim and water it thoroughly together and wait patiently. Don’t water too much. Once the roots are established, water them thoroughly for the first time. alright.

2. Prune a lot! When transplanting seedlings, reduce branches and leaves to reduce water transpiration. The crown cannot remain still at all.

3. Sulfur and iron deficiency. Prevention and control method: You can spray .03 ferrous sulfate solution three times in a row, one week apart each time. The mist point should be fine and even when spraying. At the same time, 0.2 urea iron aqueous solution can be used for top dressing outside the roots.

Hurry up and prune a lot of branches!

When transplanting seedlings, branches and leaves should be reduced to reduce water transpiration. The tree crown cannot move at all, or it will die. What to do if the newly transplanted plant turns yellow

What kind of plant? It would be better to post a picture to see. After transplanting, potted plants generally need to be pruned to reduce evaporation, control watering, and water thoroughly.

What should I do if the leaves of the potted Dendrobium plant turn yellow?

The leaves of the potted Dendrobium plant begin to turn yellow after 15 days. Generally speaking, the reasons for the yellow leaves during this period are There are the following aspects:

1. The substrate is not suitable for growth and the root system is inactive: Dendrobium officinale aerial roots*** in the air, absorbing air and rainwater.

Solution: The first choice of substrate material is bark, followed by sawdust. They all need to be crushed, sterilized, and fermented. Several materials and substrates of different thicknesses are usually mixed.

2. Water too much, the substrate is too wet, and the roots will rot.

Solution: Potted Dendrobium officinale needs to be watered every one or two weeks. After watering thoroughly, spray it regularly and control factors such as air circulation on the balcony.

The stems and rhizomes of Dendrobium officinale are not dead and can germinate again after spring warms up, but watering should be controlled to prevent root rot.

3. Water shortage and drought: Water shortage causes yellow leaves. Some growers control water excessively, and the current humidity is relatively low, which leads to yellow leaves. Although it is winter now, water control cannot be excessive, especially for bed-planted Dendrobium officinale. Yellow leaves are more common in winter due to lack of water.

Solution: Watering should be slightly acidic to neutral water. Avoid excessive calcium, magnesium and other minerals in the water.

Sufficient water is required in spring, summer and early autumn. After the Mid-Autumn Festival, it gradually enters a dormant state, and the amount of watering should be reduced accordingly until watering is completely stopped. Watering can be reduced before the leaves turn yellow, further reduced as the leaves turn yellow and fall off, and stop watering when the leaves fall off.

In North China, it is necessary to maintain a high indoor air humidity after stopping water to prevent the pseudobulbs from shrinking. If the indoors are too dry, water the pots every 1 to 2 weeks.

4. There are too many miscellaneous bacteria in the matrix, and the bacterial competitiveness of the root system is insufficient.

Solution: Fermented bark or sawdust, coconut shells, bagasse, decomposed leaves or moss are used as cultivation substrates. They must be fully dried in the sun and treated with octyl sulfuric acid to kill insects. Pests and eggs remaining in the soil.

5. The sun is too strong and dendrobium is exposed to the sun: the growth environment needs to be controlled in a humid and semi-shady place. If the sun is too strong, it will make dendrobium feel dry, which is not conducive to its aerial root breathing, so control Its growing environment is very important.

Solution: Sufficient light. Control the amount of shading between 30% and 50% in spring, summer and autumn. Only with sufficient light can a large number of flower buds be formed.

6. The temperature is too high and overheated.

Solution: Dendrobium does not like too high temperatures in summer and often stops growing in hot summer. It should be placed in a well-ventilated place.

After the flower buds grow, the greenhouse temperature should be maintained at 20°C to 25°C during the day and around 15°C at night. It should not be too high or too low, otherwise the flower buds may easily fall off.

7. Fertilizer problem.

The leaves of Dendrobium officinale first begin to turn yellow from the leaf tips, and then the entire leaf begins to turn yellow and then fall off. This phenomenon may be caused by a lack of potassium, which will cause the leaves to turn yellow at the tips first and then fall off entirely.

Solution: Spray potassium fertilizer.

8. Physiological yellow leaves: In winter, it is normal for yellow leaves to appear in the middle and lower parts of old plants (mature plants grown from last year’s autumn buds or this year’s spring buds), so don’t worry.

Solution: Don’t worry.

You must be familiar with the production environment of Dendrobium officinale and the environments in which it is suitable to grow. Dendrobium prefers a humid and semi-shady environment. In particular, wild Dendrobium officinale has higher environmental requirements and only needs a humid and semi-shady environment. It is conducive to the respiration of aerial roots. If dendrobium has been planted in an environment with high temperature, dryness, and strong direct sunlight, the leaves will easily turn yellow, so the choice of environment is very important.

There is also the influence of weather and seasonal changes, which will also affect the color changes of Dendrobium officinale leaves. For example, the seasonal climate has a great contrast, the temperature difference between morning and evening is large, and the temperature is very high in some places. A sudden drop in temperature, coupled with changes in moisture in the air, may also cause the leaves of dendrobium to turn yellow. Therefore, during seasonal changes, potassium-containing organic fertilizers should be added in time to improve plant stress resistance and maintain leaf moisture.

When a Dendrobium officinale leaf turns yellow, you must pay attention. If you do not deal with it in time, it will cause the entire Dendrobium officinale to dry up. Therefore, you must deal with the yellowing of Dendrobium officinale leaves appropriately and appropriately. problem. How to transplant seedlings

This is a bit of a problem. There are many steps in the process. The important thing is to not damage the roots and ensure the moisture of the seedlings! What should I do if the leaves of the newly transplanted iron tree turn yellow

1. Overwatering

Most plants will suffer from root rot if they are overwatered. phenomenon occurs, and root rot can easily lead to yellowing of leaves, and a large area of ??leaves will turn yellow. If this happens, if the iron tree is a potted plant, the iron tree should be transplanted to a drier pot. Just cut off the rotten roots and yellow leaves, and it will normalize after a while.

2. Lack of fertilizer

The reason why iron trees are called iron trees is because iron trees prefer iron. When many people cultivate iron trees, they will put a pair of iron nails or iron nails at the roots of iron trees. It is iron filings, so that it can absorb enough iron elements. However, if the leaves turn yellow due to lack of fertilizer in the iron tree, then you should pour ferrous sulfate solution to quickly provide iron elements to the iron tree, and then bury a certain number of iron nails or iron filings.

3. Insufficient light

Iron tree is a light-loving plant. If you place it in a dark environment for a long time, it will cause the leaves of the iron tree to turn yellow, so it is recommended We should often move the iron tree to the sun, or place the iron tree directly in a sunny place.

4. Pests and diseases

Leaves are damaged by scale insects, and some of the affected leaves will turn yellow due to damage. In this case, just spray a certain amount of 3-hypertonic fenoxycarb , you can easily solve the reason why the leaves of iron tree turn yellow. After the money orange tree was transplanted, the leaves rolled up. What happened?

It means that the water absorbed by the root system is not enough to supply the transpiration of the leaves, and the leaves are wilted. But it doesn’t matter, as long as the roots and branches are still alive, after the leaves fall off, the branches can still sprout. A package of techniques for transplanting and planting new seedlings

3.0.1 Depending on the tree species and transplantation time, it is generally divided into There are two types of transplanting: bare root transplanting and transplanting with soil balls. Transplantation with soil is divided into soft-packed soil ball transplantation and hard-packed wooden box transplantation.

3.0.2 The root system regulations during transplantation are generally 7-10 times the diameter of the trunk at 1.3m of the tree. The depth of the root system depends on the distribution of the root system, which is generally 70-120cm.

3.0.3 Before transplanting a large tree, the roots of conditional or old trees should be cut off 1-2 years in advance.

3.0.4 Tree species and methods suitable for transplantation

Theoretically, as long as the time is mastered and the measures are reasonable, any species of tree can be transplanted. Here we only introduce the common transplantation methods. Trees and methods taken.

a) Evergreen trees: juniper, pitch pine, whitebark pine, cedar, dragon cypress, arborvitae, spruce, fir, Huashan pine, etc.

b) Deciduous trees and precious ornamental trees: Sophora japonica, Sophora japonica, small-leaf ash, maple, ginkgo, magnolia, etc.

c). Suitable transplantation methods

1) All evergreen trees and deciduous trees that need to be transplanted during the non-dormant period or trees that require a longer period of time should be transplanted with soil balls. Transplantation method, the general dry diameter is 15-20cm. If the soil is hard, the soft-packed soil ball method can be used for transplantation. The diameter of the soil ball is 1.5-1.8m. The stem diameter is 20-40cm using the square wooden box transplantation method, and the square box size is 1.8-3m. Generally, the size of soil balls and large wooden boxes is 7-9 times the dry diameter.

2) All deciduous trees transplanted during the dormant period can be transplanted with bare roots or a small amount of bare roots with protective soil. Generally, the root diameter is 8-10 times the dry diameter. (Except for trees with special requirements)

3.0.5 Time for transplanting large trees

Deciduous trees: This should be done during the dormant period of trees after falling leaves, which is spring and autumn in Beijing.

Evergreen trees: can be carried out in spring, summer (rain) and autumn, but transplantation in summer should miss the vigorous growth period of new plants, and transplantation in spring is generally the best. Why did the top leaves of the apricot saplings transplanted a few days ago turn yellow?

The top leaves of the apricot saplings transplanted a few days ago turned yellow. This is because you did not set the stem (cut off part of the branches) when transplanting. When transplanting fruit trees, because the root system is destroyed, if the above-ground parts are not pruned, the original root-to-shoot ratio will be broken, resulting in insufficient water and nutrient supply, resulting in late germination or small leaves and poor growth after germination (after germination) Planted leaves will turn yellow and wilt). Countermeasures and suggestions: Pay close attention to setting the stem to a height of about 80 cm (or cut off about 1/3 of the entire seedling), and ensure that there are 3-5 full buds under the cut. What should I do if the leaves of a large tree turn yellow and fall one year after transplanting?

There are two common reasons for yellowing of leaves:

1) The root system is injured during the construction and transplanting process. Failure to deal with it in time can lead to root blackening, rot, viral diseases, etc.

2) Long-term lack of nutrients in the tree causes malnutrition.

Solution: For 1) dilute Zhongwei Kuaihuo Linxinzi fungicide and Chunyu No. 1 and then spray it on the leaves. For 2) use Happy Forest Rooting Liquid and Chunyu No. 1 to irrigate the roots or spray on the leaves. You can use it again after a week. In severe cases, you need to use it 3-4 times.