Possession, transportation, or the giving away of up to 1 ounce marijuana/8 grams concentrate by an adult (over 21) is LEGAL.
It is also LEGAL for an adult to homegrow up to 6 plants as well as process and keep the entire harvest.
Smoking in public or possessing an open container is punishable as an infraction by a $100 ticket.
Smoking where tobacco is banned is punishable as an infraction by a $250 ticket.
If you are aged 18-20, the possession of up to 1 ounce of marijuana, 4 grams of concentrate, or 6 plants is punishable as an infraction by a $100 ticket.
Defenses under the Compassionate Use Act (Prop 215) still apply.