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Hi Mark S I don't know of anyHi Mark S I don't know of any onions that can be grown completely indoors. That doesn't mean that they don't exist. A number of varieties of onions are "day length" sensitive, though so be careful. These onions will give all their energy to the greens while the days are getting longer and put the energy into the bulb once the days get shorter.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?