Posted: 25/02/2014 at 15:23
You ask about hedgehog. Yes, hibernacula are always good, but above all make sure there's enough water. You could mulch the area underneath the hedge. The mulch alone would benefit more wildlife than bare soil and you never know you could get stuff growing afterwards. Honeysuckle will definitely grow through laylandii. There's a hedge in our graveyard which is full of it, plus elder. I have a rose which grew 3 meters in the first year underneath a 5 meter high Cupressus. The birds will happily shelter in your hedge so it isn't all bad. I personally don't want to get into design points because for me wildlife come first and recreating a British woodland edge is my primary goal, (with the inclusion of what I was given and what will pep it up for diversity.) The sky is almost the limit for what to plant. You are better off looking a 'top ten plants for wildlife' list and a wildflower supplier such as Emorsgate Seeds and Naturescape, there others but I find these are the best.
Your woodpile should be shady for detritus feeders. For a bee hotel etc then it should be in sun. For a dry stone wall effect it should be in full sun, south facing so don't try to compromise. One or the other is best if you want the best. how about both and burry some of the logs. Make a hibernaculum using some of the logs, could be an underground one for frogs and toads, and even for lizards depending where you are. There's loads of suggestions and loads of great websites. Knowing what to search for helps though.