Insecto Smoke Bomb - Permethrin Fumigator for Empty Grow Rooms
Best for: clearing an unoccupied grow room, shed or glasshouse of flying and crawling insects between crops.
Our thoughts
This is a between-crop tool, not something to set off with plants in the room. Light it, seal the space, leave it, come back later to a room that's been properly fumigated rather than half-treated with a spray you might have missed corners with. Choose the size based on your room, not just the price, an undersized bomb in a big room won't do the job properly.
Insecto Smoke Bombs are one-shot fumigation canisters designed to sterilise unoccupied grow rooms, sheds and glasshouses of flying and crawling insects, including spider mites. Each canister uses permethrin, a widely used synthetic pyrethroid insecticide, released as a fumigant smoke that fills the sealed space and reaches insects hiding in cracks, corners and growing media that a spray might miss.
They're designed for use between crops, when the room is empty of plants and can be sealed for the duration of the treatment. Insecto Bombs work on the same principle as Fortefog Fumers, another well-known fumigation product in the category, releasing their active ingredient as smoke rather than liquid spray for more thorough room coverage.
How it compares
Smoke bombs and fumers are the standard tool for a full room reset between grows, distinct from spot-treatment sprays.
- Versus Fortefog Fumers: both work on the same smoke-fumigation principle and are comparable in use case; Insecto is sized across Mini, Midi and Maxi options to match different room sizes.
- Versus handheld insecticide sprays: a spray only treats surfaces you can reach and see, while a smoke bomb fills the entire sealed volume of the room, reaching gaps and crevices a spray can't.
- Versus biological pest control (predatory mites, etc.): biological control works while plants are in the room but takes time to establish; a smoke bomb gives a fast, complete reset when the room is empty.
The right tool for a full between-crop clean-out, not for use with plants still in place.
Usage guidance
Correct sizing and a fully sealed room are the two things that make or break results.
Choosing a size
Match the bomb size to your room: Mini (3.5g) suits small tents and cupboards, Midi (11g) suits mid-sized grow rooms, and Maxi (27g) is for larger rooms and glasshouses.
Sealing the room
Seal all doors, vents and gaps before lighting the bomb, and make sure extraction fans are switched off, otherwise the smoke will be pulled out before it can work.
After treatment
Leave the room sealed for the time stated on the packaging, then ventilate thoroughly before anyone re-enters or plants go back in.
Technical specifications
- Active ingredient: Permethrin
- Format: One-shot fumigation smoke canister
- Sizes available: Mini (3.5g), Midi (11g), Maxi (27g)
- Use case: Empty, sealed grow rooms, sheds and glasshouses between crops
- Targets: Flying and crawling insects, including spider mites
- Application: Not for use with plants or people present in the room
- Manufacturer: Insecto
Who this is for
- Growers doing a full clean-out between crops
- Anyone who's had a persistent pest problem and wants a complete room reset
- Shed, glasshouse and grow tent owners needing insect control in an enclosed space
- Not suitable for use while plants or people are present in the room
Our take
A straightforward, well-established fumigation product for the one job it's meant for, clearing an empty room properly between grows rather than trying to spot-treat around plants.
Does exactly what it should, day in, day out, provided you size it correctly and seal the room.
