Posted: 25/04/2016 at 13:37
I grow all my 50+ hosts in pots, and nearly gave up a few years ago when by mid June they represented lace curtains. Since then I have discovered copper tape. Each Spring (last week this year) I remove the top inch or so of compost, where any slug eggs may be (the robins help with this!), then redress with new loam based compost, re-grit the tops, and put a ring of copper tape around each pot. I will not say that there are never any slug holes, as they can climb walls and throw themselves into the pots, but they are reduced, over the last several years, by over 85%. We still have many slugs around, and do use the ferrous, comparatively safe, slug pellets, it does help to keep them under some degree of control. I have given up with delphiniums, sadly, but otherwise manage most slug fests do come along better than they ever did. Good luck - hope it helps you too.