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    How to Harvest and Store Onions

    Onion bulbs

    Harvest bulb onions when they reach full size, about 90 to 100 days after sowing. Harvest the leafy tops of green onions any time after the plant has grown 6 inches tall or taller. Bulb onions—also called main crop onions–are commonly sliced or chopped and served raw in salads or on hamburgers or sandwiches or […] More

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    When to Plant Onion Seeds

    Onion seedlings

    Onions are easy to grow from seed, but you must start early. In the Northern Hemisphere, sow onion seeds indoors in January and February, outdoors in April or May. Onion bulb formation and daylight Onion bulb formation is influenced by the length of daylight and the hours of dark each day. So-called long-day onions form […] More

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    How to Grow Scallions


    Scallions are green onions. They are immature onions. They are not a variety of onions. They are sometimes called spring onions. Scallions can also be grown from bunching onions; bunching onions are a type of perennial onions that never form bulbs. Scallions can be grown from all kinds of onion varieties. They can be thinnings […] More

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    Onion Growing Quick Tips

    Onion Bianca di Maggio 2

    Sowing: Sow onion seed in the garden after all danger of frost has passed in spring and the soil is at least 55°F (13°C)—warmer is better. In warm-winter regions, plant onions outdoors in the fall. Start onion seed indoors 8 weeks before transplanting seedlings to the garden. Sow seeds in a warm, well-lighted location—in a […] More

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    Planting Onions

    onions in garden

    Grow onions from seed, seedlings, or sets (small dry onion bulbs started the year before). Bulbing onions require 80 to 120 days to reach harvest. Green onions are harvested before they form bulbs, in 40 days or less. Spring onions form small, immature bulbs and are harvested in 40 to 60 days. Onion Planting Calendar. […] More