New lawn problems
During this spring I laid a turf lawn and now I have a problem which I cannot identify.
There was a gravelled area which had been there for 10 years and decided to turf it. I removed the gravel, dug the area over, laid some top soil to bring the level up, levelled it and laid turf. An area the size of a dustbin lid appeared to be struggling. Due to excellent weather, plenty of rain and sun the turf grew quickly. I decided to cut the grass (only topped it) and all was fine apart from this area which turned brown and died. I thought I had scalped it as the roots had not established. I removed the turf and re laid new. Within 2 days the same area died off. I removed the turf along with approx. 10 inches of the soil, replaced the soil with 'garden centre' approved top soil and re turfed. Although the shape of the area changed, it has died off again. I am left with an area which looks like an amateur crop circle.
The rest of the turf has established well but there are a couple of brown rings which have appeared. All I can deduct is there is something nasty deep within the soil which is coming through. Surely it should have evaporated or released during the 10 years the gravel was down. I don't suppose there is any use in trying to neutralise the soil if it is that powerful.
Any thoughts would be extremely useful, many thanks.