We moved to this house three years ago. The first spring, I dug out some of the grass to make some space for veg. The results in the first year were okay, not spectacular, but okay. Last year was not as good. Some things, radish, beetroot etc seemed fine, but the onions were poor, larger than when we set them, but ping pong ball sized at harvest. This year, worse, the other things seemed to grow fine, but the onions are even smaller, larger than when the sets went in but perhaps 2cm at best. I've only taken a few up, but the results are obvious. Can I leave the remaining onions in the ground over winter so they can have another full season?
We have used an organic fertilizer each year which claims to be best, well, it would wouldn't it, and certainly other roots have done well again. It is the onions that are the mystery.