Hello Salt -
I'm in the north and I start onion seeds around Dec. Use seed no more than 2 years old if possible so don't buy too much but do try different varieties just like with tomatoes. I start seeds in flats and keep giving them haircuts. It makes them much stronger. Eventually they get planted to their own cell well in advance of plant out . Plant way more than you need and only the transplant the strong ones. You could also directly plant a variety package of onion sets as a cheap back up (about a dollar). I love the smell of fresh onions when I'm working around them.
- Lisa
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