I recall reading something on companion planting and crop rotation that mentioned some crops shouldn't be planted near or where garlic or other alliums were planted. The reason was that those plants would have stunted growth.
Is this true and if so what plants are affected by this? Are there any plants that benefit from being grown in a location where garlic was?
According to my Companion Planting book, legumes, peas and potatoes should not be grown with or near garlic because it affects their flavour and growth. Everything else (carrots, etc) is fine, in fact, the garlic may well have a good effect on pests which affect other crops, such as carrot fly. There is an idea that planting garlic near roses means the roses have fewer diseases, in particular, blackspot, which doesn't thrive in the presence of sulphur - garlic accumulates sulphur as it grows, so in theory, it should have an impact, but I've not noticed any real difference.
I have planted garlic as a rabit deterrent around all my plants. I didn't realize that garlic can cause stunted growth, but here is my data:
Plants that seen not to have been affected: tomoatoes, squash (various kinds)
Plants that are smaller than I would like: marigolds, some hot peppers, eggplants
I don't know if the lack of growth is due to the garlic or not.
