I am planning on starting my onions from seed using the overwintering method where you put the seeds in a plastic container of potting soil in early spring, put it outside with a cover with a few holes in it, keep an eye on it to keep it moist but not wet and then plant the babies outside when the ground is warm enough to work. This is supposed to have them start growing when conditions are right and you don't have to harden them off because they have been outside the whole time. Any one tried this? Any tips?
 
I was told that if you plant onion sets (bulbs), you will get green onions. If you want larger onions, you have to plant seeds or the green
sets that come in bunches.
.....jiminwisc.......
From my understanding (just research, no practical yet), sets are made by planting seeds, waiting a few months, then digging them and forcing them to go dormant. The issue with sets is that because they have already gone dormant, they are on their 2nd year and they will want to grow more top than bulb and then set seed. I assume this might be a good way to get seeds for a variety that you can only find in sets.

There is also a type of onion called bunching onions that actually grow in clumps and don't need extra space around them. I believe that these are actually scallions not onions but I'm not sure if there is a real difference other than shape (scallions being tall and pointy and onions being more round and flat)
 

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