Mix a balanced organic fertilizer into the bed or row before planting your onions, taking care to get it into the soil below the plants. Do not feed plants that are nearing maturity if you want very sweet onions.
If you don't start your own seeds, set out sets (small dormant bulbs) or pencil-size seedlings in spring, while the soil is still cool.
Our Garden Planner can produce a personalized calendar of when to sow, plant and harvest for your area.
Onions respond to changing day length. Grow short-day varieties in southern latitudes. Long-day varieties work best in northern areas. Try growing different varieties from seed to explore differences in bulb color, size and shape.
Prompted by consistent demand, we have found time to modify the annual calendar so that it works for the southern hemisphere! The sowing dates are grouped in blocks of 10 days, so three blocks per month: early, middle and late.
Mairi Macpherson sent me her sowing schedule for Scotland, at 57 north, and has kindly agreed to allow me to add it here as a downloadable PDF document.
It is an option for people in colder climates with a shorter growing season.
The common advice of 'sow every two weeks' applies only if you want lettuce hearts. For loose leaves, 4-5 sowings in the whole year* suffice, when you use my method of never cutting lettuce plants, but picking outer leaves every few days. This allows a long life to each plant, see my lettuce video for more details. And my lettuce growing guide.
I include links to my Growing Guides for vegetables listed. These guides give in-depth knowledge on how to sow, care for and harvest your vegetables. My online course, From Seed to Harvest, is a collection of all 30 guides.
Sow outside: garlic if not already sown, and broad beans. After mid-month, sow lettuce, spinach, peas, onion seeds and sets, salad onion, early brassicas, parsley, coriander, dill and parsnips, and first early potatoes late March.
Atlanta, GA - The start of Vidalia onion season is almost here, with the official pack date announced by the Georgia Agriculture Commissioner and Vidalia Onion Committee today. Vidalia onion fans across the country can mark their calendars for April 17, when the sweet onions are set to ship to grocery stores nationwide.
About the GDA
The Georgia Department of Agriculture (GDA) is the voice of the state's agriculture community. The department's mission is to provide excellence in services and regulatory functions, to protect and promote agriculture and consumer interests, and to ensure an abundance of safe food and fiber for Georgia, America, and the world by using state-of-the-art technology and a professional workforce.
Because Vidalia onions are sweetly unique, farmers united to seek legal protection for their crop and its name. Federal Marketing Order No. 955 was established in 1989, to stipulate where the crop can be grown and help with research and promotion of Vidalia onions. The Vidalia Onion Committee administers FMO No. 955 and authorizes production research, marketing research and development and marketing promotion programs. This federal program along with Georgia state laws that protect the Vidalia trademark have provided a legal framework for the industry.
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