Sheet Mulch and raised beds. This is a classic permaculture technique for establishing a forest garden and revitalising the soil. The school yard is clay and very hard packed by many years of trampling by little feet. The sheet mulch will suppress the grtass and any weeds and give us a chance to feed up the soil and boost its mini bugs and beast content. A healthy open soil is of course the key to a healthy garden. Many of the plants we are choosing to use are especially good at helping this process. Deep rooted plants like comfrey complementing the shallower rooted fruit trees for example. A thivk layer of straw and Zoo Poo compst will be allowed to saok up some moisture and when the planting is complete we will close over with a layer of card and wood chip.