My Ah Kung used to grow spring onions in basins, and he was very careful when he harvested them. He told us to peel it down.
I experimented growing spring onions without a pot or growing them directly into the ground.
I bought baby onion plants from King's garden centre.
and a bag of potting mix.
I cut a rectangle out of the bag lying it face down.
I transplant the baby plants into the bag of potting mix.
Water them everyday.
These two pix were taken two weeks apart.
See how much they have grown.
Soon they will be ready for the table either in my cooking or in my salad.
Nothing is better than your own organically grown food.