California’s legal cannabis framework hasn’t changed for 2026, but the Department of Cannabis Control clearly isn’t counting on everyone knowing that.

April 20 falls on a Monday this year, and the agency pushed out a fresh round of consumer guidance ahead of the holiday. The DCC’s reminders span possession caps, where you can actually light up, what you can’t do behind the wheel, and why the licensed retailer down the street matters more than the guy offering a discount.

Start with the basics. Adults 21 and older can legally possess up to 28.5 grams of cannabis flower and up to 8 grams of concentrated cannabis. Home cultivation is capped at 6 live plants per residence, and there’s a detail a lot of people get wrong: that’s 6 plants for the household, not per adult. Two people sharing a place don’t get 12 plants combined. Six. Full stop. The plants can’t be visible from a public space, and local cities or counties can layer on stricter rules than what state law allows.

Consumption rules are where casual consumers tend to get tripped up. Smoking or vaping cannabis is off the table anywhere tobacco smoking is already banned, and that covers most workplaces, public parks, and anywhere within 1,000 feet of a school, daycare, or youth center when kids are present. Landlords can also prohibit smoking on their properties. If you’re renting, don’t assume the balcony is fair game until you’ve read the lease.

Driving is the clearest line the DCC drew in its guidance. “Don’t drive high,” the agency said, and it’s not a suggestion. California prohibits operating a vehicle under cannabis influence, and open containers inside the car are illegal the same way open alcohol containers are. Passengers can’t consume while the vehicle’s moving, either. Zero exceptions on this one.

The unlicensed market question comes up every April. Buying from unlicensed sources skips the state’s mandatory testing that screens for pesticides, heavy metals, and microbial contamination. The DCC has run enforcement sweeps against unlicensed operators across California, pulling products and shutting storefronts that can’t show a valid license. A price that seems unusually low is often a signal that testing didn’t happen.

Interstate transport is something the DCC flagged specifically for 4/20 travelers. Cannabis purchased legally in California can’t cross state lines, and that doesn’t change just because Oregon or Nevada also has legal recreational cannabis. Federal law controls what happens between states, and cannabis is still a Schedule I controlled substance under federal statute. Taking flower on a road trip across the border isn’t a gray zone. It’s a federal crime.

The broader picture for California’s cannabis market heading into April 20, 2026, is that licensed retail sales remain relatively limited relative to the population, which means the unlicensed market isn’t going anywhere soon. The DCC’s annual 4/20 push is partly about compliance and partly about building the habit of buying legal among Californians who still haven’t made the switch.

One more thing worth noting for home growers: the 6-plant cap has been state law since adult use passed, but enforcement at the local level is inconsistent. Some jurisdictions have banned home cultivation outright. Check with your city or county before you plant anything, because state authorization doesn’t override a local prohibition.

The Department wants the holiday to go smoothly. The rules for making that happen aren’t complicated. Know your limits, stay out of the car, buy from a licensed shop, and keep the plants inside.