Field Notes

UV gets all the attention, but it's rarely the problem under standard LEDs. The variables that actually determine whether predatory mites thrive in a lit grow space are humidity, heat, and photoperiod — and all three are fixable once you know what to look for.

Predatory mites have been managing pest populations in orchards and gardens for decades — the outdoor track record is solid. The approach is just different than indoor. Here's which species handle real outdoor conditions, when to release for the season, and why suppression is the goal that actually keeps your plants healthy.

Most growers release predatory mites with a vague goal of "getting rid of the pests." But eradication and ongoing protection are different strategies, requiring different species, different formats, and different expectations. One is a campaign with an end. The other is a programme that runs alongside your plants. Here's how to know which one you're actually running — and how to make it work.

The larvae of Cryptolaemus montrouzieri look so much like mealybugs that growers routinely try to wipe them off their plants. That's the beetle they just released, eating the pest they paid to eliminate. Here's how to tell them apart — and everything else you need to know before you release the most effective biological mealybug control in existence.

You released the predatory mites three days ago and the spider mites are still there. The nematodes went in a week ago and the fungus gnats are still flying. This is the moment most growers reach for a spray — and it's usually the wrong move, because the beneficials have already started. Here's what's actually happening after a release, and how to read the signs that it's working.

Spraying whiteflies knocks back the adults you can see. It doesn't touch the eggs. The eggs hatch, the nymphs are harder to kill, and three weeks later you're back where you started — except the population is slightly more resistant. Here's how predatory mites and Orius break that cycle by targeting the stages your spray misses.

T22 is not a pesticide. It's a fungus that colonises plant roots, hunts and eats soil pathogens, produces antifungal compounds that diffuse through the root zone, and simultaneously triggers the plant's own immune system. Then, separately from all of that, it makes your roots bigger and your nutrients more available. Here's how each of those things actually works.

That packet of powder contains millions of living nematodes in a state of suspended animation — dried down, refrigerated, and waiting. Here's the biology that makes it possible, how they're produced at scale, and what actually happens in the fifteen minutes after you add water.

Ladybugs and predatory mites can run in the same space without meaningfully interfering with each other — but they're not doing the same job, and one won't cover for the other. Here's when the combination makes sense and when it's just extra cost.

The honest answer is: it depends. Predatory mites work exceptionally well under the right conditions — and fail predictably under the wrong ones. Here's how to know which situation you're in before you spend anything.

Predatory mites are the biological control solution to spider mites, thrips, broad mites, fungus gnats, and more — and they don't harm plants, people, or pets. If someone has suggested you add more mites to fix your mite problem, this is the article that explains why that's actually correct.

Broad mites are microscopic pest mites that cause twisted, bronzed new growth on peppers, cannabis, hoyas, and dozens of other plants — and they're almost always misdiagnosed first. No webbing, no visible culprit, just a plant that keeps getting worse while you adjust the pH. Here's what they actually are, how to identify the damage, and how to get rid of them for good.