water logged clay garden
Hi, new on here. My son has moved into a new build with garden which was once a pub car park. He has about 8 inches of top soil under which is a thick layer of orange clay, no idea how deep the clay goes. He's planted up two borders removing as much clay as possible (digging down a couple of feet), put down a layer of pea shingle and compost on top. Unfortunately the clay has now turned the borders into a clay pot retaining the water and turning the compost into a bog garden. The soil does eventually dry out but its been so wet his plants have started to suffer. Any suggests as to what he could do? Other than completely digging out the clay which would be too costly for him the only solution we can come up with is raised flower beds. His next-door neighbour has 4 mature trees along the border but even they don't soak up the water.