I've decided that I'm going to be regrowing a lot more onions this year. I've planted onions before from seed, but not enough to fully supply myself. I experimented with a couple of techniques that worked well for me this last fall.
I had a bag of onions that I bought at a store that had multiple sprout and go soft before I could eat them. I planted each of them and ended up with ~3 onions growing from each. I didn't bother separating the young plants from the main onion bulb, so they didn't grow to full size. I'm going to try separating them this year to see if they grow larger when not crowded.
The second technique involved cutting the bottom 1" off an onion before using the rest. You put the onion in a shallow bowl of water (so it doesn't cover the top) and it will grow new roots and green shoots and can then be replanted. These also end up growing ~3 new onion plants. I've seen where others have used moist soil to accomplish the same regrowth.
I've also seen where this second technique can be used for scallions/green onions.
Both techniques are simple, so you might want to consider them.
I had a bag of onions that I bought at a store that had multiple sprout and go soft before I could eat them. I planted each of them and ended up with ~3 onions growing from each. I didn't bother separating the young plants from the main onion bulb, so they didn't grow to full size. I'm going to try separating them this year to see if they grow larger when not crowded.
The second technique involved cutting the bottom 1" off an onion before using the rest. You put the onion in a shallow bowl of water (so it doesn't cover the top) and it will grow new roots and green shoots and can then be replanted. These also end up growing ~3 new onion plants. I've seen where others have used moist soil to accomplish the same regrowth.
I've also seen where this second technique can be used for scallions/green onions.
Both techniques are simple, so you might want to consider them.
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