Soil in a garden, regardless of its size, can be very varied. Where there are trees it is often dry, and at a low point often wet. Old gardens, which have a history of cultivation over decades, usually have fertile, workable soil. They are in contrast to the plots of Bedfordshire’s ‘new builds’ on fields of clay and which need copious quantities of organic matter to improve the soil to successfully enable young plants to establish and grow in a newly planted garden. When gard