Included in the third episode of Old Yan's Lecture Hall, agriculture lectures continue to be updated
Recently I have received many private messages from orchid enthusiasts, and most of the problems are symptoms of black spot disease or soft rot and stem rot. The reasons are either poor air permeability of the potting medium, or mainly the problem of environmental ventilation. In fact, for a hot summer, if the environmental ventilation is not solved, the death of the plants is a matter of an instant, so you must never be careless. Strengthen quarantine, with special attention to quarantine at the orchid growing site, choose disease-free seedlings, and prevent the spread of disease. Remove diseased leaves and dead leaves, promptly cut off the diseased spots in the middle part of the leaves, and burn them in a centralized manner.
Next are questions from orchid enthusiasts. I hope you gain something from them!
1、The orchid was repotted, why has it not grown for a month?
One reason the orchid does not grow after repotting is that the temperature is high during this period, the orchid is in a dormant state, and its growth rate is slow. Another reason is that during the acclimatization period the plant needs at least half a month to adjust to the pot, and during this process of acclimatization its growth rate is also very slow.
2、Is methyl thiophanate used by watering into the pot or only by spraying the leaf surface?
This medicine can be watered into the pot, and it can also be sprayed on the leaf surface.
3、Where at home is more suitable for growing orchids?
I grow orchids on the rooftop. Growing orchids on the rooftop makes it not easy to control humidity. Methods for controlling humidity include, for example, making a water tray under the orchid rack that can catch water, or laying on the ground a carpet that easily absorbs water, or growing some green moss under the orchid rack. All of these can increase humidity.
4、How is it to use liquid fertilizer for fertilizing?
I generally do not advocate using liquid fertilizer, because with liquid fertilizer, first, the amount is not easy to control. What is generally used is slow-release granular fertilizer, placed directly on the pot surface. The amount is very easy to control, and it is very simple.
5、Does rice-washing water after fermentation need to be sterilized when used to water orchids?
I do not recommend doing this, because you should not make simple things complicated, and it is also very troublesome to carry out.
6、How can you judge whether an orchid plant is good or not?
This question is rather abstract and not easy to judge. But it can be judged through these conditions: first, look at the appearance of this orchid. The appearance mainly requires distinguishing clearly whether this pot of orchid is plum-petal, lotus-petal, narcissus-petal, a strange flower, or a variegated
plant, and you need to be clear about these classifications. Second, look at what price this type of plant and similar plants of the same type are on the market. Judging through market conditions is also a method. Finally, there is the existing quantity. The smaller the existing quantity, the higher the price. Things are precious when they are rare. Also, outstanding plants are certainly expensive, and of course they are certainly good.
7、The orchid either has black tips or rotten leaves. What should be done in this situation?
Black tips are a type of tip burn, possibly because too much water was given to the potting medium, or because the humidity of the orchid growing environment is not enough. This situation is still an environmental problem. First, the ventilation conditions must be solved. Second, the humidity required by the orchid's environment must be achieved.
8、Is it okay to spray water on the leaf surface every day when growing orchids indoors?
No, this absolutely must not be done. Especially under high-temperature weather conditions, spraying means death; even if it does not die, the leaves will develop black spots. After spraying water, the leaf surface is very moist. At this time, if the ventilation conditions are poor, it is easier for bacteria to breed, and it is easier for the plants to die.
9、When the weather is hot, is there a good method for repotting and dividing seedlings?
When the weather is hot, do not divide seedlings. It is not suitable for dividing seedlings, because dividing seedlings will create wounds, and when the weather is hot the wounds are more likely to breed bacteria, and under high-temperature conditions the wounds are very difficult to heal. Therefore, in summer, unless it is absolutely necessary, do not disturb the pot, and do not divide seedlings. Even when it is absolutely necessary, choose a time when the temperature is a bit lower to divide seedlings, for example at night.
From Monday to Friday at 20:00, Taobao live streaming, be there or be square. Enter Taobao and search for the shop name (Orchid Enthusiasts' Home Old Yan Shop), follow the shop and you can watch the live stream, and explore orchid knowledge together.