CannaGLAP
Grow cannabis in Hampton, VA
Growing cannabis in Hampton: three damp months, then an October worth waiting for
Hampton's damp does not build to a peak. It settles in. At the Langley AFB station, 3.7 miles away, July averages about 77 percent humidity, August 76 and September 77. Three months, nearly flat.
Then October falls to about 67 percent, and frost usually holds off until mid November. So stop asking how to beat the damp months. Ask how to have your buds ripening after they end.
Adults 21 and over: yes. Plant limit: 4 per household.
Main place of residence; not visible from a public way; each plant tagged with your name and ID number. Source: Va. Code 4.1-1101. Local rules (landlords, HOAs, city codes) can add more; this is a summary, not legal advice.
Indoors in Hampton: no dry night air to borrow
The damp months set the rules indoors. With outdoor air near 77 percent and nights that hold around 71°F in July and August, there is no cool, dry night air to pull into a tent. A grow in a spare room near Historic Phoebus or a garage out toward Buckroe Beach belongs in an air-conditioned space, with a dehumidifier sized for the room and the exhaust venting outside rather than back into the house.
Heat is the smaller problem. July averages about 13 afternoons at 90°F and August about 8, with July highs near 87°F. The lamp adds more heat than the weather does, and moving it to night hours helps only a little when the night itself sits at 71°F.
So time indoor flower the way an outdoor grower would. Once outside humidity drops to about 67 percent in October, the dehumidifier works far less, and a run that finishes then costs less and risks less than one finishing in August.
Winter is mild. January lows average about 32°F with highs near 49°F, and the station counts about 52 freezing nights a year. A heated room barely notices. A garage tent may want a warming mat for seedlings and the lamp on through the coldest hours, and that is about all.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 49 | 52 | 58 | 68 | 76 | 83 | 87 | 85 | 79 | 70 | 60 | 52 |
| Avg low °F | 32 | 34 | 40 | 49 | 58 | 67 | 71 | 71 | 65 | 53 | 42 | 36 |
| Humidity % | 71 | 66 | 77 | 76 | 77 | 67 |
Highs and lows: NOAA 1991 to 2020 normals, Langley Afb station (3.7 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Hampton outdoors: let October do the drying
Virginia allows 4 plants per household, grown at your main place of residence and not visible from a public way. Each plant must carry a tag with your name and ID number, so all four get one. A backyard grow meets the visibility rule only if no one on a public way can see the plants, fence or no fence.
Get seeds going under lights March 4 through March 18 and set plants out on April 15. The season runs about 202 days to an early frost on November 3, so frost rarely ends a Hampton grow. Humidity does. Photoperiod strains that finish in mid to late October ripen as the air dries toward 67 percent. Plants that finish in September do it in some of the dampest air of the months measured, so space them wide, strip the lower leaves for airflow, and check dense colas for gray mold every few days.
| Last spring frost | Mar 24 in a typical year, Apr 6 to be safe (later only 1 year in 10) |
|---|---|
| First fall frost | Nov 15 typical, as early as Nov 3 (1 year in 10) |
| Frost-free season | about 238 days |
| Nights stay 50°F or warmer | Apr 20 to Oct 24 |
| Start seeds or clones indoors | Mar 4 to Mar 18 |
| Move plants outdoors | Apr 15 or later |
Neighbors at the festival, not in your notes
Hampton keeps a full calendar: the Blackbeard Pirate Festival, the Buckroe Beach Farmers Market, the Hampton Cup Regatta. Plenty of places to run into another grower. Your notes do not need to come along to any of them.
Before your grow journal uploads, Canna GLAP encrypts it on the phone. A breach of our servers would show your grow only as coded records, and the key to read them stays with you.
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 Hampton ask
When should I harvest outdoor cannabis in Hampton?
In October, if your strain allows it. Humidity averages about 77 percent in September and drops to about 67 in October, and the first frost usually waits until mid November.
When can cannabis plants go outside in Hampton?
April 15, with seeds started inside sometime from March 4 to 18. The safe last-frost date is April 6, and the season runs about 202 days to an early frost on November 3.
Do home-grown plants in Hampton need tags?
Yes. Virginia requires each plant to be tagged with your name and ID number, grown at your main place of residence out of view from a public way, up to 4 per household.
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