CannaGLAP
Grow cannabis in Medford, OR
Growing cannabis in Medford: Oregon heat by day, cool valley air by night
Is rain the problem in Medford? Not in summer. The trouble shows up in July. At the Rogue Valley airport station, 3.8 miles from town, July and August each bring about 20 afternoons at 90°F or hotter, July humidity averages about 39 percent, and September adds about 11 more.
Then the sun drops and the valley lets the heat go. July nights average about 59°F, some 33 degrees under the afternoon high. So the real question for a Medford tent is not whether it can survive the heat. It is which hours you let the lamp run.
Adults 21 and over: yes. Plant limit: 4 per household, however many adults live there.
Four adults in one home still means 4 plants in total. Source: OLCC FAQ. Local rules (landlords, HOAs, city codes) can add more; this is a summary, not legal advice.
Indoors in Medford: put the lamp on the night shift
Flip the light schedule from June into September. With afternoons near 92°F in July and 91 in August, a tent in an upstairs room off Main Street or a Jackson County garage can climb well past the room by late afternoon. Give the lamp its on hours from evening to mid morning, so the dark period covers the hottest stretch, and let an intake fan pull in the cool night air.
Water is the second job. July humidity averages about 39 percent and June about 51, and air that dry pulls moisture from a fresh cutting faster than new roots can replace it. Keep clones under a dome, run a small humidifier near seedlings for their first couple of weeks, and lift pots to judge their weight instead of watering on a schedule.
The same dry air works for you in flower. September averages about 55 percent humidity, so a Medford flower room rarely has to fight for every point. October is the month to watch: humidity rises to about 68 percent, and a run finishing then wants steady airflow through the canopy.
Winter asks for little. Lows in December and January sit near 33°F, with about 15 freezing nights in January and 16 in December. A shed or garage tent still chills before dawn, so raise pots off the slab and let the lamp cover the coldest part of the morning.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 48 | 54 | 59 | 65 | 74 | 82 | 92 | 91 | 84 | 70 | 54 | 46 |
| Avg low °F | 33 | 34 | 37 | 41 | 47 | 52 | 59 | 58 | 51 | 42 | 36 | 33 |
| Humidity % | 89 | 51 | 39 | 53 | 55 | 68 |
Highs and lows: NOAA 1991 to 2020 normals, Medford Rogue Vly Airport station (3.8 miles away). Humidity: Open-Meteo historical model data, average daily humidity in 2024, for the months shown. Planning averages, not a forecast.
Medford outdoors: four plants and about 161 days
Oregon allows 4 plants per household, however many adults live there, so four adults under one roof still share 4 plants in total. Raise the four under lights first, starting between March 25 and April 8, and move them outside on May 6. Frost is typically done by April 8 and safely gone by April 30, but the average night stays under 45°F until May 6, and a chilled young plant can sit idle for weeks.
From there you have about 161 days before frost can return, as early as October 14 and typically around October 29. Summer sun on a dark pot can bake the roots, so use large containers or a bed, mulch the soil and water deeply on the 90-degree weeks. Aim to harvest by early to mid October, as nights cool below 45°F after October 6 and humidity climbs toward 68 percent.
| Last spring frost | Apr 8 in a typical year, Apr 30 to be safe (later only 1 year in 10) |
|---|---|
| First fall frost | Oct 29 typical, as early as Oct 14 (1 year in 10) |
| Frost-free season | about 204 days |
| Nights stay 50°F or warmer | Jun 2 to Sep 19 |
| Start seeds or clones indoors | Mar 25 to Apr 8 |
| Move plants outdoors | May 6 or later |
What the Rogue Valley does not need to know
Growers here talk, at the Thursday Rogue Valley Growers and Crafters Market, at a Third Friday reception at the Rogue Gallery, over a back fence. General tips are fair to share. Your own numbers are another matter, since only your four plants and your tent produced them.
Canna GLAP scrambles the grow on your phone before it uploads. Break into our servers and all a thief finds is Medford grow records nobody can open, since only your passphrase unlocks them.
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 Medford ask
How hot does Medford get for growing cannabis?
July and August each average about 20 afternoons that reach 90°F, with highs near 92°F, and September adds about 11. July nights cool to about 59°F, so running grow lights overnight is the simplest fix for a hot tent.
What date can plants go outdoors in Medford?
May 6, after starting seeds indoors between March 25 and April 8. Frost has usually passed by April 30, but nights average below 45°F until May 6.
How many plants can a Medford household grow?
Four in total, however many adults live in the home. The limit counts the household, not each adult.
Growing near Medford
- Grow cannabis in Springfield, OR 119 miles
- Grow cannabis in Eugene, OR 120 miles
- Grow cannabis in Redding, CA 123 miles
- Grow cannabis in Eureka, CA 125 miles
- Grow cannabis in Corvallis, OR 156 miles
All Oregon cities · Every state where adults may grow at home