Grass goes brown
Ive been having trouble with my lawn. I have tried applying weed + feed and the lawn goes a beautiful dark green for around 2 months and then brown patches start to reappear, all maybe 6ft x 6ft type size. They can be made to go away again by applying weed and feed but what is the underlying problem here? I don't really want to be feeding the lawn every 2 months surely? Any ideas?