Six inches of good top soil should be enough for an excellent lawn.
You can get by with less, say 4 inches, but the tradeoff is it will
likely need to be watered more frequently during dry spells to keep it
green, unless whatever is underneath retains moisture well. If your
doing it from scratch, some extra bucks to make sure you have six
inches of good top soil, rich in organic material, ie compost, peat
moss, etc. is well worth it. It's easy to do it right and impossible
to fix later.



wrote in message ...
"Bob Smith" wrote:
It's the first time I have looked on this group, so forgive me if I ask
something straight out of the FAQs, but here goes:

Can anyone tell me how deep topsoil needs to be to grow a lawn?

How big is your lawn, Bob? (sq ft)