# Can I grow cannabis in a closet or cupboard?

> Yes, you can grow cannabis in a closet or cupboard if it can be made light-tight, ventilated and safely powered. A space about 60 x 60 cm (2 x 2 ft) and 140–180 cm tall suits one or two plants under a 100–150 W efficient LED, with an extractor fan changing the air about once a minute through a carbon filter. Check local rules first.

- Canonical: https://genetixbay.com/knowledge/answers/can-i-grow-in-a-closet.html
- Topic: Basics · Type: How-to
- Evidence: Grower practice · Status: Draft: awaiting expert review
- Full article: [Choosing your growing system: soil, coco, rockwool or hydro](https://genetixbay.com/knowledge/systems/choosing-a-system.md)
- Also asked as: Closet grow setup | Cabinet grow | Small space grow setup | Can I grow weed in a wardrobe?
- Updated: 2026-10-31 · Licence: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/), attribute "GenetixBay Knowledge Base (genetixbay.com/knowledge)"

## Short answer

Yes. A closet or cupboard works if you can make it dark, move air through it and power it safely. About 60 x 60 cm (2 x 2 ft) and 140–180 cm tall holds one or two plants under a 100–150 W efficient [LED](https://genetixbay.com/knowledge/glossary/led.md). *Grower practice*.

**Legal first.** [Home growing](https://genetixbay.com/knowledge/glossary/home-grow.md), [plant limits](https://genetixbay.com/knowledge/glossary/plant-count-limit.md) and rules on visibility vary; check your local rules.

## Why

Light per area is what matters, not room size. Yield rose with canopy light in controlled trials [1], so a small, well-lit closet beats a big, dim room. Efficient LEDs (2.5–3 [µmol/J](https://genetixbay.com/knowledge/glossary/photon-efficacy.md) and up) [2] give enough light from 100–150 W in 0.36 m² without much heat.

Air is the hard part. A sealed cupboard heats up and fills with humid air in hours. An [extractor fan](https://genetixbay.com/knowledge/glossary/exhaust-fan.md) pulling about one closet-volume a minute, through a [carbon filter](https://genetixbay.com/knowledge/glossary/carbon-filter.md), removes heat, humidity and smell, and keeps the space under slight [negative pressure](https://genetixbay.com/knowledge/glossary/negative-pressure.md).

Darkness matters in flower. Stray light as dim as about 2 [µmol/m²/s](https://genetixbay.com/knowledge/glossary/ppfd.md) has delayed flowering in sensitive cultivars [3]. Door gaps are the usual leak.

Power must be safe. Small spaces trap heat around plugs and drivers; overloaded outlets and extension cords are a recognised fire cause [4].

## The numbers

| Item | 60 x 60 cm (2 x 2 ft) closet |
|---|---|
| Plants | 1–2, in 11 L (3 gal) pots |
| LED (efficient) | 100–150 W |
| Flower PPFD target | 600–900 µmol/m²/s |
| Extractor fan | 100 mm (4 in), 50–100 [CFM](https://genetixbay.com/knowledge/glossary/cfm.md) real airflow |
| Temperature | 22–28 °C (72–82 °F) lights on |
| Usable plant height | Closet height − pot − 30–45 cm light gap − fixture |

## What to do

1. Measure the space and the nearest outlet; check your legal limit.
2. Seal light gaps, or put a small tent inside the closet.
3. Fit an extractor fan and carbon filter at the top, with a low intake gap.
4. Run the light and fan empty for 48 h and log temperature and [RH](https://genetixbay.com/knowledge/glossary/relative-humidity.md).
5. Use an RCD/GFCI outlet, no daisy-chained power strips, and a smoke alarm nearby.
6. Grow [autos](https://genetixbay.com/knowledge/glossary/autoflower.md) or trained [photos](https://genetixbay.com/knowledge/glossary/photoperiod.md); flip photos at half the usable height.

## Common mistakes

- No exhaust, so the closet hits 35 °C (95 °F) in a day.
- [Light leaking](https://genetixbay.com/knowledge/glossary/light-leak.md) in round the door during flower.
- Plants too tall for the space after the [stretch](https://genetixbay.com/knowledge/glossary/stretch.md).

## Related

- Full article: [Choosing your growing system](https://genetixbay.com/knowledge/systems/choosing-a-system.md)
- Guide: [Choosing your setup](https://genetixbay.com/knowledge/guides/choosing-your-setup.md)
- Answers: [what size tent](https://genetixbay.com/knowledge/answers/what-size-grow-tent.md) · [controlling smell](https://genetixbay.com/knowledge/answers/how-to-control-grow-smell.md) · [electrical safety](https://genetixbay.com/knowledge/answers/grow-room-electrical-safety.md)
- Terms: [carbon filter](https://genetixbay.com/knowledge/glossary/carbon-filter.md) · [negative pressure](https://genetixbay.com/knowledge/glossary/negative-pressure.md)

## Follow-up questions

**Is a grow tent better than a closet?** A grow tent is usually better than a bare closet, because it is light-tight, reflective, waterproof at the base and has ports for ducting. Many growers put a small tent inside the closet to get both: the closet hides it and the tent controls light, spills and airflow. A bare closet works too, once gaps are sealed and the walls are white or reflective.

**How do I ventilate a closet grow?** Ventilate a closet grow with an inline extractor fan that replaces the air about once a minute, plus 25% for a carbon filter. Work out the volume in cubic feet and use that as the airflow in CFM. Exhaust to a room or window with good air, and give the closet a low intake gap so fresh air can get in.

**What plants suit a small closet?** Autoflowers and trained photoperiods suit a small closet. Autoflowers stay short and need no light change; photoperiods can be kept low with low-stress training and flipped at about half the height you can fit, since most grow 50–100% taller after the flip. Grow one or two plants in 11 L (3 gal) pots in a 2 x 2 ft space.

## Sources

1. Rodriguez-Morrison V, Llewellyn D, Zheng Y, 2021. Cannabis yield, potency, and leaf photosynthesis respond differently to increasing light levels in an indoor environment. Frontiers in Plant Science 12:646020. https://doi.org/10.3389/fpls.2021.646020
2. Kusuma P, Pattison PM, Bugbee B, 2020. From physics to fixtures to food: current and potential LED efficacy. Horticulture Research 7:56. https://doi.org/10.1038/s41438-020-0283-7
3. Zhang M, Anderson SL, Brym ZT, Pearson BJ, 2021. Photoperiodic flowering response of essential oil, grain, and fiber hemp (Cannabis sativa L.) cultivars. Frontiers in Plant Science 12:694153. https://doi.org/10.3389/fpls.2021.694153
4. US Fire Administration. Electrical fire safety (overloaded outlets, extension cords, smoke alarms). https://www.usfa.fema.gov/prevention/home-fires/prevent-fires/electrical/