Yes the onion grows under the soil.
add some alkali
Some fruits and vegetables that grow underground are potatoes, carrots, turnips, beets, sweet potatoes, radishes, onions, and garlic.
Green onions can grow in water by placing the root end in a container of water and allowing it to grow new roots and shoots. The water provides the necessary nutrients for the green onions to grow without soil.
To successfully grow bunching onions in your garden, plant them in well-drained soil with plenty of sunlight. Keep the soil consistently moist but not waterlogged. Fertilize the onions with a balanced fertilizer every few weeks. Harvest the onions when they reach the desired size by pulling them out of the ground.
Water is much healthier for green onions because green onions require water than soil to make the grow.
To successfully grow bunching onions from seed, start by planting the seeds in well-draining soil in a sunny location. Keep the soil consistently moist but not waterlogged. Thin out the seedlings as they grow to allow space for each plant to develop. Harvest the onions when they reach the desired size by pulling them from the ground.
It is important you give good amount of thought when planning to grow onions. You need to check on a location where the exposure to sunlight is good. Also, you need to remember to have an adequate drainage system. Planting the onion cloves in ridges also helps, particularly because they decrease soil moisture. But it is important tht a fertile soil is a must. But do not put too much fertilizer as onions are averse to too much nitrogen which can come from fertilizers.
Yes, as long as you have soil, water, and an onion sprout, you can indeed grow an onion in your belly button.
Will my lavatera grow in a shady area under a large confer with acidic soil
Unlike many other vegetables, onions can be used to regrow new onions by planting either a whole onion bulb or part of the onion that contains the root mass on the bottom. Once planted and hydrated, the roots on the bottom of the onion will begin to grow, and green onions will form out of the top of the vegetable. Onions can be used to grow new onions either using water - which is called hydroponic growing - or traditionally, using soil.
Onions prefer a really good quality of dirt, but they will grow in most soils, especially if you add compost or organic materials to it before you plant. The soil should be loosened and well raked if it has a lot of clay in it. Onions need good drainage, and several hours of sun daily to grow well.
in soil