Changes in house occupancy in our road, and indeed many similar medium to lower value properties in Cambridge over the years means that, where once the majority of occupiers were families and older, single persons who would take pride in maintaining their gardens, the ever increasing influx of students and professionals looking for somewhere to live in the city has meant that much of the housing stock is being turned into let only properties ( house prices are second only to London - no young families, students etc. have a chance of actually buying a house here).
This means that nobody is particularly interested in maintaining their gardens, front or back. Result - scruffy wildernesses where once were tidy, attractive frontages and productive fruit and vegetable back plots were the norm.