CannaGLAP
Grow cannabis in Los Angeles, CA
Growing cannabis in Los Angeles: no winter to beat, but a late summer that lands in flower
Los Angeles growers get something most of the country never will: a typical year with no freezing nights at the downtown station, and nights that stay at 50°F or warmer from mid February to early December. Seed companies call that an easy climate. It is, until September.
Here is the part the strain description skips: the hottest stretch of the LA year falls in August, September and October, the weeks your plants are setting and swelling flowers. How is your grow handling the heat when it matters most?
Adults 21 and over: yes. Plant limit: 6 living plants per private residence, however many adults live there.
Locked space, not visible from a public place; cities and counties can set reasonable rules for indoor grows (but cannot ban them) and may ban outdoor grows; a landlord may prohibit growing on a rental. Source: Department of Cannabis Control; conditions: Prop 64 text as passed in 2016 (H&S Code 11362.2 and 11362.45). Local rules (landlords, HOAs, city codes) can add more; this is a summary, not legal advice.
Indoor growing when the heat runs late
Downtown averages 6.3 days reaching 90°F in August, 6.2 in September and 4.4 in October. In a Silver Lake apartment or an Arts District loft, a tent runs warmer than the room with its lights on, and heat late in flower thins buds and fades their aroma. Move the light period into the night from August through October, and keep exhaust pulling from the top of the tent.
Warm nights are the catch. August lows average 65°F, so the night air you pull in is not much cooler than the tent. If the room has air conditioning, run the tent against it; if it does not, a smaller light in late summer beats a bigger one that cooks the canopy.
Humidity is steady rather than extreme, from about 63 to 71 percent across the months on record. That suits veg and clones, but it is not dry air, so dense flowers still need a fan moving through the canopy and space between plants.
Winter is the easy season. December lows average 48°F and the city rarely freezes, so a garage tent needs little added heat, and November through spring makes a strong window for an indoor cycle.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 68 | 68 | 70 | 72 | 74 | 77 | 82 | 84 | 83 | 79 | 73 | 67 |
| Avg low °F | 49 | 50 | 52 | 55 | 58 | 61 | 65 | 65 | 64 | 60 | 53 | 48 |
| Humidity % | 71 | 69 | 67 | 65 | 65 | 63 |
Highs and lows: NOAA 1991 to 2020 normals, Los Angeles Dwtn Usc Campus station (0.5 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Growing outside in Los Angeles
California allows six living plants per private residence, however many adults live there, kept in a locked space that cannot be seen from a public place. Cities and counties can regulate home grows and may ban outdoor plants, so check the rules for your address in Los Angeles County before anything goes in the ground. Where outdoor is allowed, start seeds indoors from March 4 to March 18 and set plants outside on April 15 or later.
With no frost to race, the outdoor limit is late heat, not the calendar. Give plants afternoon shade and deep watering through August and September, and expect to harvest in warm weather rather than ahead of the cold.
| Frost | None in a typical year |
|---|---|
| Nights stay 50°F or warmer | Feb 15 to Dec 4 |
| Start seeds or clones indoors | Mar 4 to Mar 18 |
| Move plants outdoors | Apr 15 or later |
Your numbers, not the whole city's
With this many growers in one city, the numbers you keep are worth something to more people than you might think. Picture a neighbor in your Silver Lake building, or a fellow grower across the Arts District, reading them. In most apps, the company behind the app already can.
Canna GLAP scrambles your grow on the phone before upload, entry by entry. A hacker who got into our servers would leave with unreadable grow records and no key. The numbers you worked for stay locked.
What is encrypted: your plants, notes, photos, feed logs and harvests. What is not: account details (such as your email, name and plan), a grow name or town if you type one, your team, and your sensors' names. The full list: what a hacker would get.
Questions growers in Los Angeles ask
Does it ever freeze in Los Angeles?
Rarely. The downtown station records no freezing nights in a typical year, and nights average 50°F or warmer from February 15 to December 4. Heat, not frost, is the outdoor risk.
When is it too hot to flower cannabis in LA?
August and September are the hottest months for a grow, with about 6 days apiece at 90°F or above, and October averages about 4. Run tent lights at night and shade outdoor plants in the afternoon through that stretch.
Is outdoor cannabis legal in Los Angeles?
California allows up to six plants per residence in a locked space not visible from a public place, but cities and counties can regulate or ban outdoor grows. Check your local rules first.
Growing near Los Angeles
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