Before hydroponics, the first step is to select the plants that are suitable for hydroponics. It is the best to grow the seedlings of Dendrobium candidum that have been domesticated for more than 2 years, or to cut off some branches and flower buds of the old plants.
Wash the selected plant carefully, wash the soil on it, and cut off the rotten root, old root or diseased root on it, then soak it in the solution with carbendazim to prevent the root wound from being infected by bacteria. After disinfection, put it in a cool place to dry, then water culture can be carried out.
When choosing a hydroponic container, it's better to use a bottle with better transparency and a neck on it, because it can let Dendrobium candidum completely into the water, if you can't find such a bottle, you can use tape to fix it.
Put the prepared hydroponic plant in the bottle, and then add water to it. Add some plant nutrient solution to the water, usually amino acid or enzyme, apple vinegar, but neither can be put too much, just a small cap. If you don't want to use these, you can also buy nutrition solution directly.
During hydroponics, pay attention to changing water and nutrient solution regularly. If it is spring, 7-10 days is the best time. If it is winter, it can be separated for a long time. Because the temperature is low and the nutrition consumed by plants is less, 15 days is the best time to change. In summer, it breathes a lot and consumes a lot of nutrients, so it needs to change nutrient solution and water every 4 to 5 days, so that it can be well watered
In hydroponics, it should be noted that the roots cannot be completely left in the water, leaving two-thirds of them outside. In addition to ensure good ventilation conditions