Hi, I'm not sure if this is the correct thread to post this question and if not, I apologize in advance.

I'm trying to grow some plants in pots (ie. mango, bonsai, aloe vera) and I've been doing some reading on potting mixes. I came across this website:

http://forums2.gardenweb.com/discussions/1...d-retention-xvi

and I'm interested in getting the components for the gritty mix.

However, I've only managed to find 1 component which is crushed granite (not sure if it's granite but had 1 bag of stones leftover from renovation, the kind where you mix with cement and apply). The size of the stones is suitable for use (1/8"-3/16").

Any idea where I can get the other 2 components (pine bark and Turface which is calcined clay)?

I understand that there have been quite a few people who use the above gritty mix for growing bonsai with excellent results. Any help is appreciated. Thanks!