We live in Lancashire in an 8-yr old house. Our garden is just a mound of clay with less than a spade's depth of topsoil built up by three layers of turf, installed by the builders in a hot summer which killed the first two layers due to lack of watering. We are trying to landscape the garden this year and establish some planting areas. I heard on Gardener's question time that the best thing to do was to cover the required area with a foot of manure and cover it with plastic sheeting and leave it for a year. I'm not sure if I've remembered this correctly. Have I got this correct?
Clay With Hardly Any Topsoil
Certified GKH Gardening Expert
Not too sure on that myself, but amending the soil is definitely in order. These articles will help with that: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/how-to-improve-clay-soil.htm