Skip to content Medical cannabis may be legally used and cultivated by qualified patients in California under Prop. 215, with a recommendation from a licensed physician. Patients under 18 require the approval of parents to use medical cannabis. See: Patient’s Guide to Medical Marijuana in California Adults over 21 may use cannabis recreationally, and cultivate six plants per parcel of land in California. Locals may “reasonably regulate” personal cannabis gardens, and the courts have ruled they can ban personal medical marijuana cultivation, which under state law is limited only by the amount that a patient needs. State law allows cooperative gardens of up to five patients. See: Cannabis Cultivation Guidelines in California. State ID card program is voluntary, issues ID cards through county health departments; see state Department of Health Medical Marijuana Program. Cannabis Provides More Than Just Symptomatic Relief Recommended reading: and Emerging Clinical Applications for Cannabis and Cannabinoids: A Review of the Scientific Literature also available as Medical Marijuana Handbook a Kindle edition. Hashish is covered by Prop. 215 according to Attorney General ruling. Cal state surveys show decline in student marijuana use since passage of Prop. 215. The Conant decision, which the US Supreme Court let stand, protects physicians who recommend marijuana for medicine (Oct 15, 2003). US Supreme Court overturns 9th Circuit Raich-Monson decision, upholds federal ban on personal use & cultivation of cannabis for medical purposes (Jun 2005). State Supreme Court Mower decision protects medical marijuana patients (Jul 18, 2002). Major medical marijuana cultivation cases in California include many acquittals for 100 plants and more. Cal NORML estimates there are 750,000 – 1,125,000 medical marijuana patients in California. Survey of Prop 215 patients shows chronic pain the top use for medical marijuana. Many studies show cannabis can be an effective replacement for opiates in pain patients.