1. Usually, we need to choose seeds with large grains, fast emergence, strong disease resistance, and good economic benefits for planting. We need to clean the seeds before sowing and choose seeds that have not been attacked by pests. Then rinse with clean water and soak in warm water at 25 degrees. During soaking, we need to change the water at least twice. After the seeds are soaked with water, we will complete the soaking and then clean the liquid attached to the seeds.

2. Before sowing, we also need to prepare the seedling tray. First, the seedling tray should be cleaned and disinfected. Let's first brush the seedling tray clean, then soak it in lime water, take it out after about five minutes, then wash it with clean water, then spread a layer of substrate on the bottom of the seedling tray, and then sow. We need to maintain the consistency of the seedling trays, even when sowing. Do not touch the seedling tray after sowing to avoid shaking the seeds and causing uneven sowing. After laying the substrate, we pour an appropriate amount of nutrient solution below, we must soak the substrate, and then spread the seeds on the seedling tray. After the seeds are evenly spread. We should move the seedling tray to a place with better ventilation and more slant sunlight. As the seedlings continue to grow, we need to gradually increase the light. When we harvest, we need to move the seedling tray to the sun to grow. During the planting process, we usually water 4 times a day. Bean sprouts planted in spring and winter should be watered less. At the same time, it should be noted that the amount of watering should not be too large. This is enough to keep the air humidity above 85%, and we need to maintain ventilation twice a day. If the weather is cold, we can shorten the ventilation time.