EB>Could be the second answers the first.
EB>        Clay soils are sometimes too heavy for Pot.  I think a sandy
EB>humus soil is good.  Then again, Clay soils with humus can be loose as
EB>well plus clay is known to hold nutrients.
       ...  Ya can't translate 'pot doesn't tolerate aluminum' to 'clay soils 
are too heavy for pot'.  Both might be true statements, but clay isn't 
aluminum.  ;-).
--- Ezycom V1.10
---------------