Charles White said:

then mix the heavy top soil with a quality sand

Why suggest sand? Depending on the *type* of soil (note that "heavy" is not
a *type* of soil), adding sand to it could wind up causing clumps damn-near
as hard as concrete. Sand really does little to "lighten" a soil mixture
when compared to, say, screened compost. Adding organic matter will do the
soil much more good than adding sand.

--

Eggs

I'd give my right arm to be ambidextrous.