On Feb 17, 4:13*am, Jane Yeoman wrote:
Has anyone used expanded sale to improve clay soil? *I read of a study
by Texas A&M which indicated it is a permanent solution to improving the
air and drainage properties for gardening.

Has anyone used it?

Jane, I use a variety of coarse aggregates from my hydroponics and
bonsai to work into my clay soil. The rough and pitted surface area
is the key. Properly sized, it really does work well in getting a
good soil structure where water and air can flow and roots can grow.
I do not recommend sand, even the highly touted coarse builders sand
especially using coarse aggregate I cant plug up many of the channels
you just created. I'm sure you understand the concept, if not do a
quick read on bonsai soils.

I wouldn't hunt the Tru-Grow brand down if it is not locally
available. No cost benefit in shipping a bunch of rock. As for other
value options, price out chicken grit ( I use a #2), Diatomaceous
Earth (DE) or kitty litter,( hopefully not used or perfumed). small
river or tumbled rock. You have to be careful with some crushed rocks
such as granite because the sharp edges can cut into roots . You can
get DE fairly cheap at the NAPA auto parts store. It is sold as super-
sorb or some such,it is a floor sweep for spills. Do wash( a couple
of times even) and drain off the liquid and save if you want a really
good insecticide( much better than tobacco) . Just ensure you put a
Warning label on it! It kinda looks like milk. ;]