Rancho Cucamonga, CA Cannabis Regulations: Home Cultivation (2026)
Key Facts
- Plant limit
- 6 per residence
- Indoor requirement
- Fully enclosed only
- Outdoor cultivation
- Prohibited
- Commercial operations
- Prohibited citywide
- Contact
- (909) 477-2750 Planning
Summary
California Proposition 64 permits up to six cannabis plants per residence for adult personal use. Rancho Cucamonga requires indoor-only cultivation under Municipal Code, and outdoor cultivation is prohibited.
11362.2. (a) Personal cultivation of cannabis under paragraph (3) of subdivision (a) of Section 11362.1 is subject to the following restrictions:
(1) A person shall plant, cultivate, harvest, dry, or process plants in accordance with local ordinances, if any, adopted in accordance with subdivision (b).
(2) The living plants and any cannabis produced by the plants in excess of 28.5 grams are kept within the person's private residence, or upon the grounds of that private residence (e.g., in an outdoor garden area), are in a locked space, and are not visible by normal unaided vision from a public place.
(3) Not more than six living plants may be planted, cultivated, harvested, dried, or processed within a single private residence, or upon the grounds of that private residence, at one time.
(b) (1) A city, county, or city and county may enact and enforce reasonable regulations to regulate the actions and conduct in paragraph (3) of subdivision (a) of Section 11362.1.
(2) Notwithstanding paragraph (1), a city, county, or city and county shall not completely prohibit persons engaging in the actions and conduct under paragraph (3) of subdivision (a) of Section 11362.1 inside a private residence, or inside an accessory structure to a private residence located upon the grounds of a private residence that is fully enclosed and secure.
(3) Notwithstanding paragraph (3) of subdivision (a) of Section 11362.1, a city, county, or city and county may completely prohibit persons from engaging in actions and conduct under paragraph (3) of subdivision (a) of Section 11362.1 outdoors upon the grounds of a private residence.
(5) For purposes of this section, "private residence" means a house, an apartment unit, a mobile home, or other similar dwelling.
Full Breakdown
45) allows any adult age 21 or over to cultivate up to six cannabis plants per private residence for personal use, regardless of the number of adults living there. 52 and the Development Code, which strictly limits personal cultivation to fully enclosed and secure indoor locations such as a locked room, closet, or legal accessory structure. Outdoor cultivation in yards, patios, balconies, and on rooftops is expressly prohibited. Cultivation areas must be secured with a lockable door, kept out of view from public places, not visible from the sidewalk or neighboring properties, and may not use butane or other flammable extraction chemicals.
Grow lights and irrigation must comply with Building Code and Electrical Code standards, including permitted 240-volt circuits where necessary. Rancho Cucamonga does not allow commercial cannabis cultivation, manufacturing, distribution, or retail within city limits under the current Municipal Code, which was adopted via Measure Q-style local prohibition.
Frequently Asked Questions
Can I grow cannabis in my backyard?
How many plants can I legally have?
Sources & Official References
Other rules in Rancho Cucamonga
California rules heatmap·Compare Rancho Cucamonga to another location·View the California cannabis regulations overview
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Home Cultivation in Nearby Cities
How other cities in San Bernardino County handle home cultivation.