Ron I don't think you need worry about growing live cacti. In fact it's dodgier to be in possession of dried because it counts as a preparation, whereas cacti growing in your garden don't. They might charge you for possession of 100g of dried chips, but they wouldn't charge you at all for having one growing in your garden so it simply doesn't matter how much more it weighs. I would say the safest scenario is therefore to have a few in your garden, and prepare from fresh rather than dried, but don't get caught during the half an hour that you're preparing it!Erowid http://www.erowid.org/plants/cacti/cacti_law.shtml said:Because of their ubiquitous availability through nurseries and major plant vendors across the country, as well as in arboretums and on government property, simple possession of columnar mescaline-containing cacti with no intent to ingest is de facto legal.
Any preparation of the cactus for ingestion would likely turn the plant into a clearly scheduled (illegal) material.
We are not aware of any convictions for the possession or sale of non-peyote mescaline-containing cacti such as San Pedro