ooh a gardening thread - #followed
@birofunk it looks most likely that the sound is also bouncing off that tall back wall and the fence above it. So basically what @hugo7 and @mashton said, planting will most likely break up the acoustics. The problem is that if its two doors down it may be bouncing off your neighbour's section of the back wall. Anyway, can you plant some trailers up by the upper section?