I live in a semi detached house. The neighbour is in his 80s and extremely nosy (and judgmental). He and his wife will stand at their kitchen window staring into our garden over the fence (which is already fairly high), and he actually stood at the fence yesterday looking through the slats to listen when my husband was quietly reprimanding one of my children for misbehaving (I spotted him staring) .
We need more privacy...what can you recommend in terms of trees or bushes we could plant or grow quickly, without spending a fortune, to block their view of our garden??