I can't argue from my own knowledge, but this seems to go counter to
the general recommendation of "raised beds" and "deep soil". Do you
really think that one foot of top soil is too much?

Salty Thumb wrote in message ...

If I recall correctly, it is suboptimal to grow stuff purely in "topsoil".
Don't remember why though. Might have to do with drainage (you want a less
permeable layer to slow water from siphoning below the root level but not
so impermeable as to continually waterlog the roots) or nutrient intake
(same idea, you don't want water soluable ions to wash beyond your root
depth).