What am I legal to do now in regard to marijuana in California? As of Nov. 9th cannabis became legal to use - for any adult above 21 years of age. California adult residents can:

Possess, transport, obtain or donate cannabis to other adults - the amount cannot exceed one ounce of plant material or 8 grams of concentrated cannabis, like hash, oil, etc..

Cultivate up to 9 plants per home or possess the marijuana harvest by of these plants (subject to "reasonable regulations" by municipal governments).

Retail sales for adult use will begin Jan 1, 2018. In the meantime, Prop 215 patients need a doctor’s recommendation to purchase at medical marijuana collectives and dispensaries.