I have been growing garlic for about 5 or 6 years with varying degrees of success. They invariably come up but I have found they do not produce a solid bulb of cloves and they tend not to store for more than about 5 months mmaximum.
I feel a lot of my problems are to do with a watering regime which is pretty harsh, ie almost none extra unless it is proper drought conditions. My soil is thick clay (I have added compost etc over the years) so I assume it is retaining enough for the plants.
I also have the problem that the plants tend to produce seed heads quite early and the stem splits as shown in the attached pictures.
Any advice truly welcomed.