how long for onion sets to germinate
Onions can be grown from seeds, sets (young, small dormant bulbs grown the previous year), or transplants. Growing onions from seed can take as much as five months. You will find seed for many varieties or cultivars of onions. Sets are easer to plant than seeds or transplants. Starting seeds. Sow onion seeds indoors 8 to 12 weeks before the last average frost date. Sow seeds in pots, flats, or trays. Thin seedlings to one inch apart when they are four inches tall.