A variation on this subject... Last year when I harvested my garlic, I found I still had some shrivelled bulbs from the previous year in the veg rack. Some had shrivelled away to nothing but some had green shoots. So I thought I may as well give them a chance and planted them out. They grew, but spindly, and have stayed spindly through the winter and this spring. At the weekend I noticed they were starting to fall over and look like they had done growing, although the shop-bought plants planted in autumn are not ready yet. (I had such a poor crop last year I ate them all and bought fresh stock.) So I pulled these little spindly things up before they got lost. Each one has formed a single round bulb about the same mass as a decent clove. Only one has made a single side-clove. So I'm ten cloves ahead for my autumn planting!