Don't know how they do it on the IOW but they do have a fair range. I read somewhere recently that some garlics have a soil preference and that you should find the one that suits your soil best. Also to find someone else in your area who also grows it. Swap bulbs for growing on every couple of years. I always choose the biggest cloves to grow on. My bulbs this year are not so good, but nothing had done particularly well in the garden