Horticulture reference

Cannabis cultivation in an indoor tent — documented protocols

Indoor tents are documented in horticulture references as the most common modern hobby-scale cannabis cultivation environment, offering documented control over every variable that outdoor and greenhouse cultivation are documented as leaving partly to chance. Published references describe the indoor tent as the format that decoupled cannabis cultivation from latitude — the documented climate inside a well-managed tent in northern Sweden is identical to the documented climate inside a tent in southern Spain, which is one published reason the modern hobby-scale community is documented as global in geography but consistent in technique. This reference walks through the documented protocols published indoor references describe.

Tent sizes and plant capacity

Published tent references describe four sizes that cover most hobby-scale cultivation. The 2-by-2 foot (60-by-60 cm) tent is documented as a one-plant footprint with a published 200 to 400 g target per cycle from a single well-trained plant. The 2-by-4 (60-by-120 cm) tent is documented as a two-plant footprint with a published 400 to 700 g target. The 4-by-4 (120-by-120 cm) tent is documented as the most common hobby-scale size, supporting two to four plants depending on training, with a published 500 g to 1 kg target. The 5-by-5 (150-by-150 cm) tent is documented as the upper edge of hobby scale, supporting four to six plants with a published 700 g to 1.5 kg target.

Published references describe canopy management — not floor area — as the documented limiter of how many plants a tent supports. A single plant trained wide with low-stress training and topping is documented as filling a 4-by-4 tent canopy as effectively as four untrained plants. The documented trade-off described in published reports is veg-time investment versus plant count: one plant takes longer in veg to fill the canopy, while four plants reach canopy fill faster but require more space at the pot level.

Light, temperature, and RH targets per stage

Published indoor protocols describe documented environmental targets that vary by life stage. For seedlings and early veg, the documented PPFD target is 200 to 400 µmol/m²/s, with temperature documented at 22 to 26°C and relative humidity at 65 to 75%. For mid-to-late veg, the documented PPFD target rises to 500 to 700 µmol/m²/s, with temperature held at 22 to 28°C and RH lowered to 55 to 65%. For early flower, the documented PPFD target is 700 to 900 µmol/m²/s with temperature at 22 to 26°C and RH at 50 to 60%. For peak flower, the documented PPFD target is 800 to 1,000 µmol/m²/s with temperature at 22 to 26°C and RH at 40 to 50%.

Late-flower targets are documented as particularly important for finish quality and mold avoidance. Published references describe a documented late-flower temperature target of 20 to 24°C with RH driven to 40 to 45%, with the documented purpose being trichome preservation (resin is documented as degrading above 26°C) and bud rot prevention (Botrytis is documented as exploiting RH above 60% in dense flower). The documented protocol described in published reports is a target rather than a fixed setpoint — published references describe day-night variations of 4 to 6°C as acceptable and even beneficial.

Air exchange and odor management

Air exchange is documented in published indoor references as the single highest-impact environmental variable. The documented exhaust target is one full tent-volume change per minute, which gives the published CFM math for sizing fans. A 4-by-4-by-7 tent has a documented internal volume of 112 cubic feet, requiring a documented 112 CFM minimum exhaust capacity at the fan, with published references describing a 1.5× to 2× sizing buffer for the carbon filter and ducting resistance — a 4-by-4 tent is documented as well-matched to a 4-inch or 6-inch inline fan rated at 200 to 400 CFM.

Odor management is documented in published references as exclusively carbon-filter-based for cannabis tents. Activated carbon filters are documented as adsorbing the terpene-class volatiles responsible for cannabis aroma, with documented effective life of 12 to 18 months of continuous use. The documented protocol is filter-on-fan-intake (filter pulls air through the filter and exhausts clean air) rather than ozone generation or scrubbing — published references describe ozone as a documented contamination risk for the cured product and scrubbing as documented less effective than activated carbon. Passive intake openings sized at roughly twice the exhaust port area are documented as the published standard for replacing exhausted air.

Strains best suited to indoor tents

Published indoor reports describe a documented strain-selection bias toward indica-leaning hybrids and short-flower lines that match the documented vertical constraints of hobby-scale tents. Northern Lights is documented as the canonical indoor indica — short, dense, and finishing in eight weeks of flower. White Widow is documented as a Dutch indoor classic with controlled height. Critical Kush is documented as another short-stature indoor indica with a documented eight-week flower. Wedding Cake is documented as a cookies-family indoor performer with a documented nine-week flower.

OG Kush is documented as an indoor indica-hybrid with manageable indoor height. Blue Dream is documented as a taller hybrid that performs in indoor tents when trained aggressively to control vertical growth. Gorilla Glue #4 is documented as a heavy-yielding indoor hybrid. For tall sativa-dominant or Haze-family lines, published references describe the documented practical constraint of tent ceiling height as the deciding factor — those genetics are documented as requiring either screen-of-green training or a larger format than the 4-by-4 standard.

Difference between a tent and a full grow room

Published references describe several documented differences between a hobby-scale tent and a full converted grow room. A tent is documented as a self-contained sealed envelope that decouples the grow environment from the surrounding room, which is described as the documented reason tents work in basements, garages, and unconditioned spaces. A full grow room is documented as treating the whole room as the grow envelope, requiring documented room-scale sealing, mini-split air conditioning, and a dedicated electrical circuit. The documented practical implication is that tents are reversible — they pack down — while a converted room is documented as a permanent installation.

Published references describe yield-per-watt as documented similar between the two formats when both are run correctly, with the tent advantage being installation simplicity and the room advantage being scale — a converted bedroom is documented as supporting four to eight times the canopy area of a 4-by-4 tent. The documented decision factor in published reports is the household context: tents are documented as appropriate for renters, beginners, and anyone wanting to keep cultivation out of permanent fixtures, while rooms are documented as appropriate for owner-occupants committed to ongoing cultivation.

Documented yield ranges by tent size

Published hobby-scale tent reports describe documented yield ranges that depend on tent size, light wattage, genetics, and grower experience. A 2-by-2 tent with a 100 to 150 W LED is documented at 100 to 300 g dry per cycle. A 2-by-4 tent with a 200 W LED is documented at 300 to 600 g. A 4-by-4 tent with a 400 W LED is documented at 500 g to 1 kg, with published first-cycle reports clustering at the 400 to 600 g end and experienced-grower reports clustering at the 700 to 900 g end. A 5-by-5 tent with a 600 W LED is documented at 700 g to 1.5 kg with the same experience-driven distribution.

Published references describe documented yield per watt as the more useful comparison metric, with the documented hobby-scale range described as 0.5 to 2.0 g dry per watt of LED draw per cycle. First-cycle growers are documented as clustering at the 0.5 to 1.0 g/W end while experienced growers running optimized protocols are documented as clustering at the 1.5 to 2.0 g/W end. The documented difference is described in published reports as almost entirely attributable to training quality and environmental management — the genetics and the equipment are documented as supporting either outcome.

Lockbox Seeds publishes reference material about cannabis horticulture for educational purposes only. Cannabis cultivation, including indoor tent cultivation, is governed by jurisdiction-specific laws that vary widely; readers are responsible for understanding the legal status of cannabis where they live before acting on any of this material.

Back to: All climate guides · All grow guides