How to grow an onion in water? Learn the correct hydroponic method
Onion is a common vegetable in daily life, but it does not store well. After being left for a while it will sprout, affecting its edibility, so many people plant it in water when they cannot finish eating it. So how do you grow an onion in water?
1. How to grow an onion in water?
Step 1: Peel off the outer layer of the onion and cut off a little of the base.
Step 2: Find a shallow glass container or a small-mouthed glass cup, add some water to it, then place the onion on top and move it to a cool, shaded place. After a few days the onion will grow leaves and many roots. When adding water, just make sure the roots are submerged.
When growing an onion hydroponically, the key point is changing the water. Generally, during the first week after starting hydroponics, change the water once a day; after 10 days, change the water once every three or four days; after 3 weeks, the onion will have grown leaves and roots, and at this point it can be placed in the living room, bedroom, kitchen and other places, where it can effectively repel cockroaches, aid sleep, and so on.
2. Can a sprouted onion still be eaten?
A sprouted onion can still be eaten. After harvested onions are dried, they can be stored for a relatively long time without sprouting or rotting, but if they are not dried or are stored improperly, they will also sprout or rot. Onions most easily sprout at around 15 degrees Celsius. An onion that has sprouted or even grown green shoots does not produce substances harmful to the human body and can still be eaten, but after an onion sprouts, the nutrients in the bulb portion are transferred to the top to support the growth of the shoots, causing the nutritional content to decline. In addition, after an onion sprouts, its commercial value is affected, and its taste is also more pungent. Therefore, onions should be placed in the sun to dry for a period of time, then kept in a ventilated, dry place to avoid sprouting as much as possible.
Overall, onions are very easy to grow in water. Just peel off the outer skin, cut off the base, and plant it in water.