1、 Processing onions

Before hydroponicing onions, you should first select larger onions. It is best to use fast sprouting onions, so that they will sprout faster after hydroponics. The dry skin of the outermost layer of onion can be peeled off, and a part of its root can be cut off with a knife

2、 Prepare container

Find a transparent hydroponic container. The opening of the container should not be too small or too large. It's just enough to jam the onion. You can use water cups, plastic bottles, etc. When you are ready, pour water into it. The height of the water can be adjusted to touch the bottom of the onion. Be careful not to pour too much water

3、 Hydroponic culture

Put the cut onion on the hydroponic container. At the beginning of hydroponic culture, change the water every day for a week, and then it will slowly grow small white roots

4、 Hydroponic maintenance

After it grows roots, the frequency of changing water can be extended. You can change water every other day. After waiting for 7-10 days, green buds will sprout at the top of the onion. At this time, it is recommended to change water every 3-4 days. To make it grow faster, you can add some rooting powder to the water, so that it will grow faster