Here is the Normal website
http://www.canorml.org/faq.html this should have all of the information you need.
"California NORML strongly advises Prop 215 patients to continue following the SB 420 guidelines – six mature or 12 immature plants and 8 ounces of processed marijuana except where local guidelines specify more. "
So it depends on where you live, what county, but you will be safe if you stay within state guidelines.
Just grow very large plants