We have heavy clay soil so we dug a trench about 3ft deep around the edge of the garden and replaced with topsoil. Now our soil is constantly waterlogged and it’s impossible to dig. So far we have one photinia in the soil but I can see that could fall over easily as it can’t grip the soil. Please help! Thankyou
Heavy soil can get very soggy if drainage is not good. Drain to a ditch or other outlet, make a herring bone pattern of land drains, back-filled with stone or gravel, to within about 30cm of the surface.
If you have no outlet, drain to a soak-pit to take the water away.