I hadn't checked on my allium bed in a few days, and when I was in the garden today, I realized several of my shallots -- all the biggest ones! -- are bolting. None of the seed seed pods or flowers had opened yet, and I snipped them all off, but I don't know if that's going to cut it.

Is there anything to be done, or ought I just to cut my losses and eat the shallot tops as green onions or large chives of a sort?

Just to be sure I didn't miss something, I pulled up one of the larger shallots, which has multiplied -- five stalks with seed pods -- but is most assuredly not bulbing. (I also pulled out one of my garlic plants, which is just starting to bulb, so this seems about right.)

Also, any ideas about what might have caused this? Planted in late October, per regional guidance from Territorial Seed and Steve Solomon.