I collected loads of leaves last autumn/fall. I coralled them in a big pile and added a kilo of composting worms. Now I have loads of nice crumbly compost. I am in the process of making a perennials bed which will mainly accommodate a large collection of Penstemons. Can anyone give advice as to the amount of leaf mould that I should dig in. ½ a barrowload for a square yard??? More? Less??
The 'base' soil is moderately alkaline... pH ~ 7.8. It has not been tilled for ages.