Long Day Versus Short Day Onions

COURTESY OF P. ALLEN SMITH

Long Day Versus Short Day Onions

    Onions are one of the most useful vegetables, so it’s a great coincidence that they’re also incredibly easy to grow. They don’t take much space, and the only real thing they demand is well-drained soil, which is easily fixed by growing onions in a raised bed or container.

Onions are sold in bundles of seedlings called starts and they are identified by day length. There are short-day and long-day varieties distinguished by how much daylight there is when onions stop forming new green leaves and start forming bulbs. In my Southern garden I grow short-day onions, 10 – 12 hours daylight, but up North gardeners have better success with long-day onions, 14 – 16 hours daylight.

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