Expanded Shale - where to buy?
Newbie gardener here trying to fix up a huge slope that's in my back yard. Have been trying to read up as much as possible on this site and so far I've concluded that the soil on the slope is mostly clay and the reason it is drying up and cracking is because it lacks organic matter or nutrients.
Found many articles/posts here recommending the use of expanded shale, but all local nurseries I called have no clue what I'm asking for - most times i have to spell it out for them since they sound surprised when I ask for it. Can anyone point me to a good supplier in OC area where I can buy it for a reasonable price?