When we moved here 10 years or so ago, the hedges which surround our 3/4 acre plot, were about 6 feet high. You could easily add another 2 feet on to that for the growth they made each summer, which meant that by August they were untidy and very oppressive. Being so high they were a real pain to trim and although they offered good protection from the wind they did cut out a lot of light from both flower and vegetable gardens.