Posted: 14/07/2014 at 13:05
Moles dig at hunting depth so deeper in winter when the worms burrow down to escape the cold and more shallow in summer or wet weather when the worms are nearer the surface. We have them and dependng on conditions we get molehills or galleries that sink when it rains or leave a trail of grass that goes brown from drought form having tunnel instead of soil for its roots. Ialso get mole hills in my flower beds which then become anthills as they are raised and dry. In my experience they barge straight through roots Under grasses, rhubarb, currant bushes, perennials........
The best treatment in the UK is a professional mole catcher.
Cats and dogs catch them too but with our terrier cross, that always involves some digging which is as bad as the moles. As I live in Belgium I can blast them with one of these - http://www-be.detaupeur.com/ - but we haven't used it in anger since we got the dogs. Excellent toy though and very satisfying and effective.
If you do catch and release any live ones, do it across a stream as they are less likely to come back but who knows? I've watched one lot migrate from the paddock across the road, tunnelling under the road and into our garden.