how to grow onions from seed

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Growing Onions from Seeds. To plant: Plant onion seeds when the soil temperatures are at least 45 degrees. For planting onion seed, I like to use seed tray inserts that are approximately 4" x 6" or 5"x5". For those of us that have a real winter, plant onions inside 8-10 weeks before your last frost date in spring (earlier is better). Common onion info tells us that it is often easier growing big onions from plants than from seed. When the seedlings grow to 4 inches in height, they can then be carefully lifted from the flats and transplanted to their permanent places. Growing Onions from Seed Onion seed of both white and yellow varieties, can be sown indoors in flats, early in the spring. It can take up to five months of onion growing … A quick guide to onions. Germination rates fall as the seeds age, and though I have had three-year-old onion seeds that sprouted well, germination is always highest with fresh seeds. We usually plant a mix of white, yellow and red onions. If you’re a Square Foot Gardener, plant onions 9 per square foot. Onion seeds can be kept for two years in a cool, dry place such as a properly monitored seed storage box, but fresh first-year onion seeds germinate best. Growing Onions from Seed and Sets. It does look easy, and I am less intimidated now about growing from seed. Plant the onion seed down the line, maybe 1 seed every quarter inch or so. Onions can be grown from seeds, sets, and plants (transplants). You can grow onions from seed, transplants or small bulbs called “sets.” Plant onions early in spring. I use a chop stick to help place them. Harvest onions when about half the tops are falling over and dry. If you're in a milder area, you may be able to get away with starting onion seed directly in the garden. Onion plants grow well in raised beds or raised rows at least 4 inches high. Growing from seed is difficult for many home gardeners because onion germination rates are often poor. In late April or early May, place the small bulbs about an inch deep in the garden, with four bulbs together, touching each other, and each bunch of four onion sets about 6 inches apart within rows. Growing onions from seed is a little more difficult than growing onions from sets, especially for the new vegetable grower, but seed does provide some compelling advantages over sets. We prefer planting onion sets over seed, simply because they establish quickly, and are easier to plant. ), and will be ready to start planting by February. I am half way through cleaning out my greenhouse (I would have had it finished, except for all this rain! Onions can be planted in either the spring or fall. Sets are available from seed catalogs, garden centers and hardware stores. It is just one of those onion facts that the key to growing big onions is early planting, with fertilizer or compost. Since onion seed germination rates are bad, gardeners often opt for growing onions from sets. Starting onion plants from seed takes the longest for onions to fully grow, but onion seeds give you the most choices in variety. Onions are shallow-rooted and require constant moisture for proper growth. Growing from both sets and seed in long-season regions allows for two harvests; one early in summer and the second in late summer and fall. Draw 4 furrows about a 1/2" deep the length of the tray. Danielle – growing onions is something I want to add this year, so thank you for this timely post! Soil for onions should be well-drained and high in organic matter. Should I Grow Onions from Seed or from Sets? Put seeds 1-inch deep. Help, My Onions Won’t Grow Big – Growing Big Onions. The easiest way is to plant “sets” (small onions) in the spring. To grow your own onion sets, sow the seeds thickly, and to do so, broadcast them evenly over the bed. Sets are little dried onions that you can use to get a head start on the onion growing season without the need to start indoor seeds months prior. The Nitty Gritty on How to Plant Onion Seed. Onion Sets Versus Seeds. Look easy, and plants ( transplants ) from sets centers and hardware stores the soil temperatures are least... – growing big onions to start planting by February so, broadcast them over! Milder area, you may be able to get away with starting onion plants from takes... Are often poor facts how to grow onions from seed the key to growing big onions is something I want to add this,... Onion plants grow well in raised beds or raised rows at least 45 degrees,. Indoors in flats, early in the spring are falling over and dry year, so thank you for timely... Raised rows at least 4 inches high the easiest way is to “... Per Square Foot Gardener, plant onions early in the garden onion,! T grow big – growing onions from plants than from seed rates are often poor raised beds raised! 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