1. Root treatment: Generally speaking, for hydroponic vegetables, it is best to clean the roots of the selected plants with clean water, then disinfect them once with a small amount of potassium permanganate solution, and then cut off the fibrous roots, dead roots and redundant lateral roots above the old roots to promote the growth of new roots.

2. Hydroponics box: It is best to choose watertight boxes for hydroponic vegetables, which are usually packed in pots or wooden boxes. It is best to use polystyrene foam plastic boxes, and then embed different foam plastic floating boards on them to hold vegetable seedlings, and then fix the floating boards.

3. Preparation of nutrient solution: The most important thing for hydroponic vegetables is the vegetative growth of vegetables, so the quality of nutrient solution should be guaranteed, and then 8kg of water is added to dissolve it.

4. Planting and sowing: then put the seedlings into the mixed liquid matrix containing peat and washing residue, put the roots into it, then punch 4-5 small holes on the floating board to facilitate air circulation and promote plant growth, and then add a proper amount of nutrient solution to the matrix, preferably in a ventilated environment.

5, seedling planting: after planting, pay attention to the root depth can not be too large, generally ensure that the matrix submerged the root part, when the sun is strong at noon, to properly shade the sun, often watering, to ensure that there is always water in the box, and in the process of plant growth, but also to get rid of the surrounding weeds in time.

6. Water change treatment: hydroponic vegetables should be changed frequently. Because there will inevitably be some bacterial residues in long-term hydroponics, rainwater, pond water or river water with a PH value of about 5.6 ~ 7 is the best. If it is tap water at home, it is usually left standing for about 2 days, and the water is changed once every 3 to 4 days, and then nutrient solution is dropped into it.