The allotment or plant growing area may be included in a residential area with buildings, roads etc. There may be large fields for agricultural or market garden products (8), also a number of small plots for growing various plants (6) which may grow up a number of fences (22a,24a).The allotment may be arranged as a long strip between two roads (12,14). There may be ordinary fences between the roads and the array of fences and growing plants. The fences in the centre portion may be of massive construction and may be lowered and raised by an electrical drive system.