oh, just so you are aware, and others are also in CA
the limits set by sb420 and counties are only there to provide local authorities with a black and white "immunity zone"
if you are under the limit, you may be harassed, but not arrested or charged with manufacture/distribution
YOU MAY EXCEED THE LIMITS without undue fear, but be aware that you increase the possibility that if suspicion is raised that you are doing this for commercial gain, that you can be arrested and charged, and will have to back up your # of plants or quantity on hand in court with an affirmative medical defense.
Federally it is still illegal, so if the DEA comes knocking, get a lawyer, and make sure that you bring up "jury nullification" in your trial, as it will be your only hope.
ASA : How to Defend a Medical Marijuana Patient in California this is also an excellent read, if you can skim through it you will understand alot more about how to defend yourself if you are ever arrested.