Is it safe to use the soil from under a walnut tree?
We are in the process of having our garden restructured. This includes paving an area around a well established walnut tree. Mounds of very rich looking soil has been removed from under it and is currently piled up on area which will become raised beds. Trouble is, I thought walnut trees made the soil round them toxic and therefore difficult for many plants to grow. Should I be using this soil at all in the new beds? Will it be ok if I mix it with plenty of compost?