In article , madgardener wrote:
it sounds like gypsum...........here in Eastern Tennessee where we have red
clay, we're taught in the master gardening classes to apply gypsum to clay
to help break it down. if the product has a website, I'd search the main
ingredients.

And, at 4-6 oz per sq. yard, it is a joke. You can make a serious
difference to clay only by changing the composition of the soil,
which means large quantities of whatever.


Regards,
Nick Maclaren.