Growing garlic

A few days ago, I found some unused garlic that had been bought in a supermarket in November. It was a bit shrunk, but seemed perfectly edible, and there was one small green shoot tip visible at the top of the bulb.
On a whim, I broke off a few cloves and stuck them in a cheap plastic propagator. To my surprise, green shoots are already an inch or two high and upon pulling one out, there was a very good one inch root network developing in the soil! Incrediblw work for just a few days.
Anyway, I searched Google for information about growing garlic and it seems it's very late to be planting it and supermarket garlic is a bad choice to use for growing. So what am I likely to get in the end? I'm expecting the need to move the cloves to a proper pot by the end of the month at this rate.
Should I semi-starve them of water, like herbs, to improve flavour?
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Hi, we are new and excited custodians of an allotment. As it was actually like a grassy field in November it has taken us until now to clear all the turf so we are a little behind. my question is this - is it too late to plant garlic? Thank you.