Horticulture reference
Cannabis growing by climate
Documented protocols for cannabis cultivation in each of the major climate bands growers operate in. Numbers reflect what is documented in horticulture literature and published hobby-scale reports — not personal recommendation.
Climate bands
5
Outdoor
4
Indoor
1
Continents
6
01 · Bands
The five climate bands
Each card opens to the full regional reference — season windows, light and temperature considerations, documented strain selections, and the pest and humidity pressures most-cited in grower reports for that band.
05
Written by
Lockbox Seeds Editorial
Editorial team
Reviewed
2026-05-23
Purpose
Educational reference. Not legal, medical, or growing advice.
- Outdoor flowering window Sep–Oct
Mediterranean
Long dry summers and mild winters as documented in California, Spain, Italy, Greece, and southern France.
Read protocol - Hard-frost cutoff late Sep
Continental
Short summer windows and hard frost dates as documented across most of Europe, the US Northeast and Midwest, and eastern Canada.
Read protocol - Native 12/12, year-round
Tropical
Year-round warmth and native 12/12 photoperiods as documented in the Caribbean, Southeast Asia, central Africa, and parts of South America.
Read protocol - Bud rot pressure high
Cool-temperate
Limited solar windows and wet autumns as documented in the UK, the Pacific Northwest, the Netherlands, Germany, and southern Scandinavia.
Read protocol - Controlled environment
Indoor tent
Fully controlled environments as documented in published tent protocols — light, temperature, RH, and air exchange targets per stage.
Read protocol
02 · How to read
How each protocol is structured
Every climate page follows the same shape so you can compare bands at a glance. Three reference axes anchor the writing.
03
01
Season window
When stretch ends, when flower starts, when frost or rain forces a cutoff. Dates pulled from published regional grower reports.
02
Light & temperature
Solar window, hot/cold caps, day/night swing targets, and where supplemental lighting or shade is documented in regional practice.
03
Humidity & pest pressure
The bud-rot, powdery-mildew, and pest profiles each band is most known for, with strain selections documented as more tolerant.
Lockbox Seeds publishes reference material about cannabis horticulture for educational purposes. Nothing here is medical, legal, or growing advice. The legal status of cannabis cultivation varies considerably by jurisdiction; readers are responsible for understanding the law where they live.
Pick your climate, find the genetics
Climate-matched seed packs at ILGM
ILGM's catalogue spans every climate band on this page — fast-finish autoflowers for short continental summers, mold-resistant cuts for cool-temperate rains, sativa-leaning equatorials for tropical native-12/12 grows, and the heavy-resin indoor lineup for tent setups. Single disclosed affiliate partner, 50-state US shipping, 90-day cookie, 100% germination guarantee.
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Jump to a climate