CannaGLAP
Grow cannabis in Brea, CA
Growing cannabis in Brea: a nearly frost-free year with space for a second harvest
Brea hands an outdoor plant a calendar with almost no frost in it. Freezing nights average 0.1 a year, and the average night holds at 50°F or above from February 25 to December 4.
A photoperiod plant cannot use all of that: it flowers when the days shorten and finishes in fall, whatever the weather does. An autoflower runs on its own clock. So the question for a Brea grower is not when the season ends, but how many rounds fit inside it.
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.
An indoor tent that never has to stop
Indoors, the mild year lets a tent run straight through, and a small one doubles as the nursery for outdoor rounds. December nights average about 48°F at the Anaheim station, 4.9 miles away, and no month's average night drops under 45°F, so a winter garage tent needs little beyond a seedling mat and lights timed through the coldest hours. January's 74 percent outdoor reading fades inside a heated house; only an unheated, damp room needs a dehumidifier in winter.
Summer is the season to plan for. Of the station's roughly 47 hot afternoons a year, August and September carry about 22, and August has the warmest afternoons, near 89°F. Put the lamps on a night schedule from July into October. Nights stay warm then, about 66°F in August, so air drawn in after dark trims a tent's heat without erasing it, and a garage tent may need an air conditioner, which cools and dries only while it runs.
Humidity held in a narrow band, 63 to 68 percent outdoors from June through October in 2024, so a flowering tent that draws from a garage or open windows wants a dehumidifier through all of flower. In a room open to it, seedlings do well; fresh clones still root faster under a dome.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 71 | 71 | 74 | 77 | 78 | 82 | 87 | 89 | 88 | 83 | 77 | 71 |
| Avg low °F | 49 | 49 | 51 | 54 | 58 | 62 | 66 | 66 | 64 | 59 | 53 | 48 |
| Humidity % | 74 | 68 | 65 | 64 | 65 | 63 |
Highs and lows: NOAA 1991 to 2020 normals, Anaheim station (4.9 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Two outdoor rounds in Orange County
California allows 6 living plants per private residence, no matter how many adults live there, locked up and out of sight of anyone in public. Cities and counties can set reasonable rules for indoor grows but cannot ban them, and they may ban outdoor grows, so look up Brea's rules first. The limit counts every living plant at once, overlapping rounds included.
Where outdoor plants are allowed, sow the first autoflowers a week before April 15 and set them out that day; photoperiod seeds go in from March 4 through March 18. After that harvest, a second autoflower round can go out in summer and still finish in fall, well before nights slip below a 50°F average around December 4. It grows through the hot weeks from August into October, so shade pots from afternoon sun, water deeply in the morning, and thin the canopy so air near 63 to 65 percent does not settle in the buds.
| Frost | Rare: less than 1 freezing night a year on average |
|---|---|
| Nights stay 50°F or warmer | Feb 25 to Dec 4 |
| Start seeds or clones indoors | Mar 4 to Mar 18 |
| Move plants outdoors | Apr 15 or later |
Keep the second harvest to yourself
Brea's calendar puts neighbors face to face: Concerts in the Park, Brea Bonanza Days, National Night Out. A home grow is one topic you may prefer to leave out of that small talk. Encryption will not hide what a neighbor smells over the fence in September. It keeps the journal private.
Canna GLAP encrypts each journal entry before it leaves your phone, with a key that answers only to your passphrase. If our servers were ever breached, the haul would be grow records reduced to gibberish, with no key to make sense of them. When your second round comes in heavier than the first, the reason why is yours to keep.
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 Brea ask
Can you get two outdoor cannabis harvests a year in Brea?
With autoflowers, yes, where outdoor plants are allowed: freezing nights are so rare that a spring round and a summer round can both finish. Every plant growing at the same time counts toward the residence's six.
Do I need an air conditioner for a grow tent in Brea?
In August and September, often. Warm nights then leave intake air less able to cool a tent, and a closed garage can overheat on the hottest afternoons.
When should I start cannabis seeds in Brea?
Photoperiod seeds go in during the first half of March for an April 15 planting. Autoflowers start about a week before each planting out, in spring and again in summer for the second round.
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