When you cut onions, you should keep them and only cut the green leaves on them. In addition to hydroponics maintenance, and give it appropriate light, so that it can be continuously regenerated.
1. Keep the rhizome: if you want to regenerate the onion, you must keep enough rhizomes. According to the variety difference, the length of reservation is different. Generally, the shallot is about 5cm, and the green part is 3cm.
2. Hydroponic growth: find a transparent glass container with a height higher than 5cm. Put the onion root down. If the container is large, you can put more. Then add clear water to it, submerge the green and white water. Don't add too much, or it will inhibit its growth.
3. Daily maintenance: in order to promote the growth of onion leaves, it is necessary to provide a suitable environment. Put it on the window sill facing the sun, so as to provide sufficient light, and the light time is no less than 4 hours every day. It can also open windows for ventilation, which is conducive to cooling. Every day to change water, choose rain or well water.
4. Harvesting the scallion leaves: generally, after 1-2 weeks, the scallion leaves can grow, and then they can be cut off. Onion leaf growth to consume the nutrients in the bulb, generally harvesting three times will not grow again, can be replaced by new onion root culture.
