CannaGLAP
Grow cannabis in Bowie, MD
Growing cannabis in Bowie: spring warms up before the frost is done
Bowie's spring runs ahead of its frost. At the Glenn Dale station, about 4.4 miles away, nights average 45°F by April 27, mild enough to tempt a seedling into the yard. The frost has not finished, though: one spring in ten it still lands as late as May 9.
Maryland allows a home two plants. Lose one to a cold night in early May and half the season is gone before it starts. So which date are you planting by, the warm one or the safe one?
Adults 21 and over: yes. Plant limit: 2 per adult; 2 per residence even with 2+ adults.
Not in public view; reasonable precautions against access by under 21s. Source: Criminal Law 5-601.2. Local rules (landlords, HOAs, city codes) can add more; this is a summary, not legal advice.
Inside a Bowie grow, season by season
Spring belongs to the tent. Seeds start from March 28 to April 11, while April still averages about 6 freezing nights. Once afternoons warm in late April, set young plants outside for a few hours to harden them, then bring them in before dark until May 9 has passed.
Summer heat in Prince George's County comes without much relief at night. July averages an 89°F high, about 14 days at 90°F and a 66°F low, so overnight lights buy less cooling than you might hope. A tent in a spare room near Bowie Town Center wants an air-conditioned room to draw from and an exhaust fan sized to clear the lamp's heat.
September is the month to watch. Humidity averages 64 percent in June, 73 in July and 75 in August, then tops the months measured at 78 in September, just as flowers fill out. Run a dehumidifier in the room, keep a fan moving air through the canopy, and give your two plants enough space that leaves never touch. October eases to 68 percent.
In winter, January lows average about 22°F. A heated house runs dry, so clones may want a dome. Only an unheated, damp basement needs the dehumidifier left on.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 44 | 47 | 55 | 66 | 75 | 83 | 89 | 87 | 79 | 68 | 57 | 48 |
| Avg low °F | 22 | 23 | 31 | 41 | 51 | 61 | 66 | 65 | 57 | 44 | 33 | 27 |
| Humidity % | 74 | 64 | 73 | 75 | 78 | 68 |
Highs and lows: NOAA 1991 to 2020 normals, Glenn Dale Bell Stn station (4.4 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Outdoors in Prince George's County
Maryland allows 2 plants per adult, but no more than 2 per residence, even with two or more adults in the home. They must be out of public view, with reasonable precautions to keep anyone under 21 from reaching them.
Plant out on May 9 or later. The typical first fall frost is around October 22, but one year in ten it comes by October 7, which leaves about 151 days. That is tight for long-flowering plants, and late September is the dampest stretch they would ripen in. Fast photoperiods or autoflowers that finish by late September make the most of two plants.
| Last spring frost | Apr 22 in a typical year, May 9 to be safe (later only 1 year in 10) |
|---|---|
| First fall frost | Oct 22 typical, as early as Oct 7 (1 year in 10) |
| Frost-free season | about 183 days |
| Nights stay 50°F or warmer | May 11 to Oct 2 |
| Start seeds or clones indoors | Mar 28 to Apr 11 |
| Move plants outdoors | May 9 or later |
| Season note | Frost can arrive before mid October here: long flowering plants may not finish outdoors |
Two plants, a careful record
When the whole crop is two plants, each note in the log has to carry a full season. Bowie has plenty of places to talk gardening, from the Summer Sunset Concert Series to the weekly Bowie Farmers Market, and a garden chat can wander. Your grow details do not have to.
Canna GLAP encrypts your two plants' records on the phone, before they reach us. Anyone who broke into our servers would find grow records sealed shut, with no key in sight. Whether a neighbor in Old Town Bowie ever learns your numbers is up to 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 Bowie ask
When should I plant cannabis outside in Bowie?
May 9 or later. Nights average 45°F from about April 27, but frost can still arrive until May 9 in one spring out of ten.
How many cannabis plants can I grow in Bowie?
Maryland allows 2 per adult and no more than 2 per residence, however many adults live there.
Which month brings the most mold risk in Bowie?
September. Humidity averages 78 percent, the highest of the months measured, while buds are ripening, so plan for a dehumidifier and strong airflow.
Growing near Bowie
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