Fortefog Fumers - Insecticidal Smoke Generators for Grow Room Pest Control
Best for: growers dealing with flying or crawling insect infestations who need to treat an entire enclosed grow space in one go.
Our thoughts
When you've got whitefly or thrips properly established, spraying leaf by leaf doesn't cut it, you need something that reaches every corner. Fortefog fumers do that job properly. Just make sure you pick the right size for your space and clear the room before lighting it.
Fortefog Fumers are insecticidal smoke generators built around permethrin (13.25% w/w), a broad-spectrum insecticide that affects the nervous system of insects. You light the fumer and leave the space sealed, the smoke fills the entire grow area, reaching leaf undersides, corners and gaps that a spray simply can't get into, making it effective against a wide range of flying and crawling pests.
They come in three sizes to match different room volumes, so you're not over- or under-treating a space, and they're designed for straightforward use in hydroponic and greenhouse setups without any mixing or spraying equipment.
How it compares
Smoke generators are a distinct pest control method from sprays, and Fortefog is one of the established names in the category.
- Fortefog's own Garlic Smoke variant uses a natural garlic-based fumigation rather than permethrin, for growers who want a non-insecticidal repellent approach instead.
- Contact sprays like SB Plant Invigorator or pyrethrum-based products treat what they touch but miss hidden pests in the same way a fumer doesn't.
- Biological controls (predatory mites, nematodes) work over time without any chemical treatment, but won't knock down an established infestation as fast as a fumer will.
Fumers trade the gentleness of biological control for speed and total-space coverage when you need pests dealt with now.
Usage guidance
Match the fumer size to your room volume and always treat an empty, sealed space.
Sizing
The Mini (3.5g) treats up to around 120m³ for flying insects, the Midi (11g) and Maxi (27g) scale up for larger rooms or tougher pests like bed bugs and cockroaches, which need a smaller treatment area per generator than flying insects do.
Before lighting
Clear the room of people and pets, seal doors, vents and extraction, and remove or cover anything you don't want smoke residue on.
During treatment
Light the fumer as directed and leave the space sealed for the time stated on the packaging, don't re-enter until it's finished and the smoke has cleared.
After treatment
Ventilate the space thoroughly before re-entering or returning plants, and wash any surfaces that had direct food-grade contact.
Technical specifications
- Active ingredient: Permethrin, 13.25% w/w
- Format: Pyrotechnic insecticidal smoke generator
- Sizes: Mini 3.5g, Midi 11g, Maxi 27g
- Coverage: Roughly 25-1000m³ depending on size and target pest
- Target pests: Flying and crawling insects including whitefly, aphids, thrips
- Brand: Fortefog
Who this is for
- Growers with an established flying or crawling insect problem that sprays haven't cleared
- Anyone with an enclosed grow room or greenhouse that can be sealed for treatment
- Growers who want one-off, whole-space treatment rather than repeated daily spraying
Best suited to enclosed spaces that can be fully sealed and vacated during treatment.
Our take
It's a proven, no-nonsense way to deal with a pest problem that's got past the point where spot-spraying helps. Pick the right size for your room and follow the clearance time properly.
Worth picking up if pests have got a foothold and you need the whole space treated in one go.
