Ah, for a quiet Sunday morning in summer. Do you yearn for your own little oasis, without the buzzing of lawnmowers, the whining of leaf blowers, the impatient honking of car horns? Most of us can’t surround ourselves with acres of woods or fields to gain privacy. But with the right landscaping we can all create our own small havens and shut out the rest of the world, at least for a while.