    
Short-Day Onions
This is a term used by people who grow onions.
Onions will form a bulb when the temperature and the number of daylight hours hit the right combination for them which triggers their clock. Short-day onions will start bulbing when the day is 11 to 13 hours long.
Onions use daylight to produce a good deal of top growth before they form bulbs (and the more top growth, the bigger the bulb). When the day reaches the right number of hours for that variety of onion, the onion will stop forming top growth, and form a bulb instead.
In southern areas, Short-day Onions are even started in the fall, and grown over the mild winters, when the days are short. This allows for maximum top growth, as the bulbs won't start forming until the spring when the magic number of daylight hours happens.
In North America, the limit is roughly 32 degrees north, a latitude line that runs from central Georgia through to southern California. Short-day Onions would start bulbing too soon in the north, before a good deal of top growth had happened, and so the bulbs would be small, about the size of a pearl onion. In very northerly places, such as Canada or Scotland, which can have 14 to 20 hour days, Short-day Onions might never form a bulb.
Temperature wise, Short-day Onions are generally only hardy to about 20 F / -7 C. Most sweet onions are Short-day varieties.
Other entries for Short-Day Onions
Short-Day Onions
Other entries for Onions
Apaz Onions, Boiling Onions, Calçot Spring Onions, Cipollini Onions, Green Onions, Grelot Onions, Intermediate-Day Onions, Leeks, Long-Day Onions, Pearl Onions, Ramps, Red Onions, Red Spring Onions, Scallions, Shallot, Sweet Onions, Yellow Globe Danvers Onions
Other entries for Root Vegetables
Añú, Beet, Carrots, Cassava, Celery Root, Crosne, Garlic, Herbed Vinegars, Horseradish, Jerusalem Artichokes, Jicama, Konjac Root, Malanga, Oca, Parsnips, Potatoes, Prairie Turnip, Radishes, Rutabaga, Salsify, Scorzonera, Sea Holly, Swede, Sweet Potatoes, Taro, Turnips, Water Chestnuts, Yacon, Yamagoboo, Yams
Other entries for Vegetables
Agave, Artichokes, Asparagus, Brassica Family, Canned Vegetables, Cardoons, Celery, Corn, Cucumbers, Eggplant, Frozen Vegetables, Gourds, Horseradish Tree, Hoshi Shiitake, Leafy Vegetables, Lotus, Mixed Vegetables, Mushrooms, Pak Wan, Peas, Peppers, Sago Palm, Seaweed, Spinach, Sprouts, Squash, Tomatoes, Viscous Vegetables
Top...
|
|
| |
|