Many other people have probably thought of this but I am going to give this a trial.
Although it is late in the year I am going to plant these rather small garlic cloves (teaspoon for scale), 3 for 90p. Now I normally buy garlic from the Isle of Wight garlic farm. but they are a little steep in price for me at the moment.
When in Tesco-poly a few days ago, I picked this pack up and thought I will just have a go. I dont know if they have been heat treated but I thought why not. I am going to plant them in trugs and see what happens. Then we can move them if we find a house.
I have had great success with Jerusalem artichokes, ginger and tumeric, which I bought from in a supermarket and planted. I am hoping this will work as well.
I will keep you updated. Have you tried garlic growing from supermarket bulbs?