Don’t abandon the idea of a productive garden just because you don’t have acres. Fruit trees on non-vigorous stock are small, pretty and good value – especially crab apples and quinces. Soft fruit bushes can be trained into lollipop shapes, salads can be grown in shade, bees do brilliantly on a balcony or rooftop, and you may even be able to squeeze in a couple of bantam hens.