Subsoil
SteveP5b
Posts: 47
Hi all, we are lucky enough to be having an extension built and the foundations will require18 cubic meters of soil to be dug out. I wish to spread this over the lawn to lift the level slightly higher than our neighbours. The reason for this is we live on heathland that floods easily. Is it possible to grow grass on this subsoil and could I improve it in some way?
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Posts
I think that would depend on the subsoil Steve. Mine is sticky clay and wouldn't make a good lawn
In the sticks near Peterborough
Ours is quite sandy and stoney in other areas grey clay and sand.
I should think the sandy part would be OK though you might have to remove some stones. Sand get brushed into holes made in lawns to assist drainage.
There should be some lawn experts around to assist soon. I only know about grass with extras (some would say weeds)
In the sticks near Peterborough
If its sandy and you sieve out stones which would damage the lawnmower, spread it very thinly on the lawn, let it grow then spread thinly again, building up in layers.
Don't ever spread clay on top. Our neighbours did, and when it rained it diverted the rain through my garage.
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I would say you are asking for trouble, there is no life or air in sub soil, nothing will grow and you probably would have to remove it at a later date!
During the winter storms a very large beech tree in the "lords" estate blew over, the surface roots just snapped!
When I had a look there appeared to be no roots penetrating the sub soil, just large surface roots spread over a wide area!
You could use it but the top 4 - 6 inch would have to be good soil or bought top soil.
Thanks for your replies. I have a plan to push the topsoil to one side and place the subsoil underneath, then put the top soil back on top. Hopefully a mini digger