She Who Procrastinates... Eats Onions in May?

Late last autumn, I was digging out a few of the 'Fuldaglut' and 'Voodoo' sedums from the Japanese rock garden to use as edging in another bed when I made a discovery: Three strays that had escaped the onion harvest. I wasn't too surprised by this find--after all, the red onion skins were about the same color as the sedum leaves, so the oversight was understandable. I made a mental note to come back and dig them before I went inside for the night.

Fast forward to... okay, well, this week. I am in the backyard taking the usual spring pictures: Groundbreaking buds of peony bushes, an amazing number of atriplex hortensis seedlings, etc. Out of the corner of my eye, I catch sight of several jaunty spears of green. Onion green, to be exact.

Being curious, I pulled a little of the dirt away from the bulb and poked it. It seems pretty firm. The greens are up about 6 inches already, and it didn't take long to find the greens from the other two stray onion bulbs as well.

I admit, I am a little bit out of my comfort zone on this one. I have always been good with the usual cycle: Plant onion sets in the spring. Harvest tasty onions throughout the late summer and fall whenever you need onions. Suffer through a NE Ohio winter with bland onions from the grocery store, and then begin the whole process again the following spring.

Anyone know what I can expect from these three intrepid red onions? Will they do something magical and give me seeds or baby onions to plant somehow? Will they flower and then turn to mush--or be tough and yucky like old grocery store onions if I try to eat them?

I'm always up for an experiment so I won't be digging them up... I'd just like to know what I might be in for on this one. And whether it's worth really whacking back that beautiful salvia that you see in the picture so the onions can get some more sun.