How to raise orchids in summer and how to prevent and cure leaf spot

Summer is a test for many flowers and plants, and many flower friends ask how to raise orchids in summer. I have raised orchids for many years and have been raising orchids on the balcony since I lived in the building. In order to solve the problem of balcony gentleman orchid spending the summer safely, many attempts have been made, such as hanging sunshade net, building bamboo curtain, spraying, installing air conditioning and so on.

Especially after the installation of air conditioning, the cooling effect on the balcony is obvious, but it has both advantages and disadvantages. And the disadvantages outweigh the advantages, so later removed the air conditioning, sunshade net, bamboo curtain, spray and other equipment, the implementation of the current practice is: ventilation, more light, frequent watering, no fertilization.

Specifically, it is: 1, keep the windows on both sides of the balcony open to maintain natural ventilation, and those without natural ventilation can also be forced to ventilate; 2, only hang white gauze curtains after removing shade objects such as bamboo curtains. Accept some light as much as possible (with light not beating flowers as degrees); 3, frequently watering to maintain the humidity of the basin soil, never dry and then watering; 4, summer high temperature does not apply fertilizer. After years of practice, the result is no rotting roots, no running strips, no soft rot, and good growth.

If you have any other good ideas, please send them up and learn from each other to make up for your weaknesses.

1, balcony gentleman orchid safe summer one of the basic practices "ventilation"

After the post of my "balcony gentleman orchid safe summer basic practices" was published, Lanyou sent me a message asking me to make a specific explanation. In order to answer Lanyou, it is divided into four questions. Today, let's first talk about "ventilation": after the summer, the weather is getting hotter, whether it is the flower cellar or the family balcony, all those who raise orchids should open windows for ventilation, which is not only the common sense of orchids, but also one of the important means of cooling. In particular, the balcony (the focus of this article is balcony, flower cellar ventilation is another matter), if the area is small, the temperature rises and falls fast, if you do not open the window in time, the high temperature in summer will cause great harm to the gentleman orchid like a steamer. The occurrence of diseases such as rotten roots, yellow leaves, wiping heads and leaf spots are mostly related to poor ventilation.

Therefore, it is necessary to strengthen the ventilation consciousness of raising orchids in summer; the specific approach is to open the windows on both sides of the balcony. How big should I open it? According to the geographical location of the family, the strength of ventilation flexible use, to be able to natural ventilation for the degree. If the balcony is connected to the neighbor and cannot be ventilated naturally, it is necessary to consider strengthening ventilation (such as installing exhaust fans, etc.). Therefore, it is said that the high temperature in summer to ensure ventilation is one of the important means to raise the gentleman orchid.

2. The balcony gentleman orchid safely spends the summer the second basic practice "more light"

The growth of all things depends on the sun, and this is especially true of gentleman orchids. Gentleman orchid does not like particularly strong light, especially in summer, but it can not be without light. Magnolia needs good light to grow normally all the year round. Summer fear of bright light flowers also for cooling (hanging shading net can cool 3 to 5 degrees) put forward shading (also called shading, shading net) problem. Some people understand shading (shading) as magnolia afraid of the sun, so they put it away from the sun and even under the table and under the bed. In fact, this is a misunderstanding, as far as the flower cellar is concerned, because the top light needs to be blocked, 50% of the sunshade net in North China will be fine.

In other words, the flower cellar gentleman orchid can also accept about 50% of the light in summer; the balcony is different (excluding the balcony). In summer, only a small amount of light can come in from the south side of the balcony due to the change of light angle. The gentleman orchid placed on the balcony can not receive the light at all except the place by the glass. A little bit of light coming in will not cause the light to beat leaves if it is blocked by a white curtain.

Therefore, summer balcony gentleman orchid does not need shade, the light is not enough. If you are willing to experiment, you will find that the gentleman orchid that receives light near the glass grows better, tall and straight, and bright than the gentleman orchid that can not reach the light; the leaves of the gentleman orchid that cannot be illuminated are gray and even sick (not much about the truth or benefits of seeing more light. Ask orchid friends to think and practice.) . Because the balcony gentleman orchid and the glass distance is different, receives the light spot is also different, therefore no matter spring, summer, autumn, winter should often change the place. Especially in summer, it is necessary to change places frequently, so that more magnanimous orchids can receive as much light as possible. By the way, my "balcony gentleman orchid safe summer basic practice" of the "visible light" approach (requirement) is conditional, that is, "ventilation" do not forget ah!

3, balcony gentleman orchid safe summer basic practice three "frequently watering"

Water is the key to the existence of gentleman orchid life. Without the water, the life of the gentleman orchid will stop. Water is the carrier, and all kinds of nutrients in the soil can only be absorbed by the roots after dissolving in water, and are transported to the various organs of Cymbidium under the action of water. Some people say that raising orchids through watering for three years has suddenly raised watering to an important agenda; what we want to talk about today is an important practice (means) for balcony magnolia to spend the summer safely: if the summer temperature is high and evaporates quickly, the water demand of magnolia is bound to increase. Coupled with "ventilation", "see more light" balcony gentleman orchid must be "frequently watered" in order to maintain humidity. And watering is an effective means of cooling and increasing oxygen, so watering frequently is also the basic skill for the balcony gentleman orchid to spend the summer safely. Some people say that if the gentleman orchid is not dry or watered, it should be dry and thoroughly watered. This statement is only half true, that is, the gentleman orchid should be thoroughly watered (and should not be watered), while the other half is not correct. Once dried, the fleshy root is damaged, and it is difficult to recover after the damage. At the same time, it is difficult to water thoroughly after it is dry, and once it is thoroughly watered, it will either run or rot. Some orchids are like suffering in summer, wiping their heads, rotting roots, soft rot, leaf spots and other diseases occur one after another, which has something to do with the idea that "gentleman orchids are afraid of water but not afraid of drought."

We say that frequently watering is to keep the humidity of the basin soil up and down; watering is built on the basis of no leakage to cool, cool and increase oxygen. Therefore, the hotter and drier the weather is, the more attention should be paid to "watering" and watering thoroughly. The mastery of specific watering time, interval and quantity needs to be combined with their actual conditions to practice, summarize and use flexibly.

4. Balcony Magnolia safe summer spending the fourth basic practice of "no fertilization"

Magnolia is a kind of flower that likes to be fat and resistant to water. Nitrogen, phosphorus and potassium fertilizers are indispensable. Commonly used fertilizers are large, small sesame seeds, perilla seeds, sesame seeds and other oilseeds fried as base fertilizer. It can be applied three to four times a year, from the end of September to early April of the following year, combined with liquid fertilizer that has been fermented for at least one year. But balcony gentleman orchid cannot be fertilized in summer, which is a very important guarantee in the basic practice of balcony gentleman orchid spending the summer safely. Because of the high temperature in summer, the root hair of Cymbidium is very short, and the function of absorbing fertilizer is greatly reduced, and the orchid has been in a semi-dormant state; if fertilized in summer, the temperature of fertilizer fermentation basin will rise, and the existence time of root hair will be even shorter. the absorption capacity of water and fertilizer will be reduced or even stopped, and diseases such as running strips, rotting roots, wiping heads and high fever and softening will occur. Therefore, in order for the balcony magnolia to spend the summer safely, we must stop fertilizing. Of course, you can apply fertilizer if you can keep the temperature in your home at 12 degrees Celsius and no more than 25 degrees during the day.

By the way, someone asked: why does your balcony gentleman orchid spend the summer safely? why do you only talk about keeping ventilation, seeing more light, watering frequently and not fertilizing, regardless of temperature? In fact, my four questions are all about the temperature. If it were not for the balcony with high summer temperature, I would not have these four problems.

Explain here: although the family balcony rises and falls quickly, it has a very superior side, that is, it is connected with the bedroom and the courtyard. The bedroom and courtyard are suitable for family life and rest, and the indoor temperature suitable for family life and rest is bound to be passed on to the balcony. Therefore, the summer balcony temperature is only slightly higher than the bedroom, the courtyard, coupled with the four basic practices I mentioned earlier, the balcony gentleman orchid can be guaranteed to spend the summer safely.