How to solve the problem that the leaves of Cymbidium turn yellow and black?

As we all know, orchid is a very valuable and beautiful flower plant, its variety is very many, ink orchid is one of them. Although the orchid is not a rare variety of orchids, but like other orchids, it needs careful maintenance. If the maintenance method is improper, it will lead to yellowing of the leaves and affect the appearance of the whole plant. Simplicity is unbearable. So what should we do if the leaves turn yellow and black in Mo Lan?

What if the leaves of Cymbidium turn yellow and black

1. Overwatering

In winter and spring, it is best to water before and after sunrise, and spray to increase air humidity to benefit the growth of ink orchid. In summer and autumn, before and after sunset, the leaves should be dry before nightfall. When the surface of the matrix is dry, it needs to be watered as soon as possible, not too dry for too long. And the watering method should be correct, watering along the edge of the basin is better.

2. Excessive fertilization

Fertilization should be moderate, not too much. Fertilize once a week during the growth period, the growth of Magnolia is slow in autumn and winter, apply fertilizer once every 20 days, do not pour it on the leaves, pour a small amount of water after fertilization, and clean the residual fertilizer in the soil. Fertilization must be carried out in the evening on a sunny day, and there is a risk of rotting roots on cloudy days.

3. The temperature is too low

Pay attention to the anti-freezing of Mulan, do not put it outside in winter. The most suitable temperature for the growth of Cymbidium is 18 ℃ ~ 28 ℃. It grows slowly below 10 ℃ in winter and goes into dormancy. However, the winter temperature can not be too high, higher than 25 ℃ will affect the dormancy of Cymbidium, affecting the growth of the following year.

4. Lack of light

Proper exposure to more sunlight, especially the morning light before 9: 00 in the morning, is very beneficial to the growth and flowering of orchids. There should be 40%, 50% shade in winter and spring, and 80%, 90% shade in summer and autumn.

The solution to the rotten root of Melanie

1. Remove the rotten part

When the rotten roots of Meran are found, take the wolf out of the basin and cut off the moldy, blackened and hollow rhizomes according to the degree of rot of the roots, leaving the unrotten parts. At the same time, cut off the diseased leaves with spots and yellowing. As long as the bulb is completely rotten, it can survive.

2. Change the soil

Beat the old red brick the size of a pecan with bark at 1:1. If you only use earth, add crushed red bricks, put the big pieces below, and the small ones and the earth on top. However, in order to prevent the plant from being infected with germs, it is necessary to change a clean plain tile pot when replanting, or you can choose non-polluting plain sand planting.

3. Spraying chemicals

There must be some kind of bacteria in the rotten roots of the plant, so the medicine should be sprayed with fungicides in time, and carbendazim was used to irrigate the roots for 2 or 3 times.

4. Control water and fertilizer

In the subsequent maintenance, it is necessary to control water and fertilizer. Watering see dry and wet, the bottom of the basin will stop when there is water flowing out, and the basin will become dry and even whiten and water in time. For orchid plants that return to the pot, do not apply fertilizer until the growth is restored.

How to water ink orchid

Usually in indoor culture of Cymbidium, the flow of air is slow, and the evaporation of water will be reduced accordingly, so you can use the right amount when watering. We have to keep the soil in a semi-dry state, which is watering for about 10 days at most. Watering should ensure that the soil is fully moistened, and when you see a small amount of water seeping out from the bottom of the basin, you can stop watering. While watering, you can also wipe the leaves with water, which can make the leaves look more shiny.

What about the curl of the leaves of Cymbidium

1. If it is a disease, it can be diluted with potassium permanganate and sprayed, and Mn, K and other elements can be added. If it is hormonal drug damage, you can use some Opal, pay attention to the use of hormones in hot days when the dose should be smaller, do not put it on the new leaves.

2. If it is too hot, you can help it to resist drought in the process of maintaining. after it sets fruit, it can add water and fertilizer at the right time to help it block out the light. If it is caused by the wind is too strong, you can slowly let out to exercise it.

3. If there is a lack of phosphorus, you can add phosphorus to the soil or leaves. For example, the dose of potassium dihydrogen phosphate is only 0.3%. If it is lack of magnesium, magnesium sulfate can be used to help it.

Through the above content, I believe you have a certain understanding of the maintenance skills of Mo Lan. In fact, as long as there is patience, master the correct maintenance skills, breeding a beautiful and generous ink orchid is no problem, placed in the study, the office is very appropriate.