Key points of Orchid events in Shanghai in November

Key points of Orchid events in Shanghai in November

Shanghai has entered Xiaoyangchun weather since November. The highest temperature is above 20 ℃, the lowest temperature is below 10 ℃, and the average temperature is about 13 ℃. At this time, there is a confrontation between hot and cold air, Rain Water is more, the air is humid, and the temperature changes greatly. Cold air is gradually dominant in the second half of the month, and there is often a cooling weather of about 10 ℃. Therefore, it is relatively easy to manage orchid affairs this month, with emphasis on making grass and turning pots.

First, make grass.

In order to meet the harsh winter, orchids should be gradually refined this month-to control the growth of orchids and make them old. Specifically, we can start from the following three aspects:

1, buckle the water. This month, the growth of orchid grass will gradually slow down with the drop in temperature, and we should also gradually extend the interval between watering orchids, especially in the second half of the month (including the first ten days of December), that is, they should be watered but not watered. Deliberately let the plant dry for three or five days and then water thoroughly, and the watering time should be carried out in the morning.

2, add luster. The temperature is not high this month, orchids no longer need shade, conditions can give orchids full light, there are no conditions should also find ways to increase light to orchids. Sufficient light, bluegrass health, especially sunlight can increase the temperature, can promote the growth of orchid roots and the emergence of latent buds through winter.

3. Avoid nitrogen. Orchids can still be fertilized this month, but potassium fertilizer and phosphate fertilizer should be the main fertilizer, and nitrogen fertilizer should not be applied. The application method can still adopt the combination of root irrigation and foliar spraying, and the time should still be sooner or later, and the root irrigation can decide whether to return water or not according to the application concentration. Due to the slow growth rate of orchids this month, the interval of fertilization should be lengthened accordingly, depending on the fertilizer content of the plant materials used.

Second, turn the basin

The growth rate of orchids slows down this month, and the temperature is suitable, which is a good time for orchids to turn pots, but we should pay attention to the following points.

1. Turning the pot here means that for orchids that have not been turned over for many years, if they are on the pot and grow normally within two or three years, and the flowerpot has enough space, it is not necessary to turn the pot.

2. Those who have a bud and want to enjoy the flowers next spring should not turn the pot now, but they can turn the pot again after the flower next year.

3, the plant material replaced by turning the basin should be discarded as much as possible. If you want to use it, it must be cleaned, cooked at high temperature, sterilized and sterilized before it can be used.

4, whether it is too many seedlings, or split for multiple seedlings, can be combined with turning the basin at the same time, with four or five seedlings conjoined as good, easy to rejuvenate, do not split single.

5. according to the management after turning the basin, there is no watering within three days, no fertilization within three months, and no turning over the pot within three years. I think we can look at the orchids and plant materials and grasp them flexibly according to our own management habits.

Third, other matters

1, pest control: there are fewer diseases and insect pests this month. In order to give priority to prevention, one or two drugs can be sprayed on the leaves, and at the same time, in order to control overwintering bacteria and insects, one-time sterilization and insecticidal drugs can be applied to the roots.

2, the temperature changes greatly this month, if the strong cold air strikes, it will often cool down more than 10 ℃, so we should pay attention to do a good job of heat preservation and wind prevention.

3. Orchids raised by families in Shanghai are generally indoor. If orchids are raised outdoors, they should move indoors later this month to prepare for the winter.

4, orchids should not be caught in the rain this month, and foliar spray should be reduced to prevent orchid leaves from black spot disease.

The draft was completed on November 10, 2005.