A slow-release of predators, to prevent your pests.

Predatory mite sachets are small, breathable paper packets containing a self-sustaining colony of beneficial mites along with their food source. The colony reproduces inside the sachet, and adult predators emerge gradually over about 30 days to patrol the surrounding plant for spider mites, thrips, broad mites, and russet mites. They're a chemical-free method of pest prevention used widely in commercial greenhouses and increasingly by houseplant collectors.

Each sachet is designed to release predatory mites continuously for approximately 30 days. After that, the food supply inside is exhausted and the colony stops producing new adults. For continuous prevention, replace sachets every four weeks.

For spider mite prevention, the best options are Phytoseiulus persimilis (the two-spotted spider mite specialist), Neoseiulus californicus (drought- and heat-tolerant), or Amblyseius andersoni (effective across a wider temperature range). If you're unsure or have multiple plants in different conditions, the Special Blend covers spider mites alongside thrips, broad mites, and russet mites in a single sachet.

For thrips prevention, Amblyseius cucumeris is the longstanding standard — it targets first-instar thrips before they damage new growth. In high-humidity environments at 70% RH or above, Amblydromalus limonicus is more aggressive on thrips and persists longer. Amblyseius swirskii also has measurable activity against thrips and is well-suited to warm tropical setups.

No. Predatory mites are obligate predators of other mites and small insects — they have no interest in humans, pets, or vertebrate animals, and their mouthparts are not capable of biting through skin. They are safe to release indoors around children, dogs, cats, reptiles, and birds.

FGMN ships predatory mites Monday through Thursday from a US-based insectary. Orders placed after Thursday will ship the following Monday to ensure the colony arrives in optimal condition without sitting in a warehouse over the weekend.

Probably not — predatory mites measure under half a millimeter, smaller than the period at the end of this sentence. Around 80% of growers never spot them on their plants. The sachet itself is visible hanging in the canopy, and that's the indicator that prevention is active.

Yes, with timing. If you've sprayed neem oil or insecticidal soap, wait one day before deploying sachets — the residual film breaks down quickly and won't harm predators after that window. Avoid systemic insecticides such as imidacloprid or acephate altogether, as their tissue-level persistence will harm predatory mites for an extended period.

Sachets are designed for prevention and low-pressure situations. When pest damage is already visible and populations are high, the slow trickle of predators emerging from a sachet won't catch up to the pest reproductive rate. For active infestations, deploy adult predators from bottles for fast knockdown, then transition to sachets for ongoing prevention once numbers are under control.

Sachet coverage is dosed by linear feet rather than per-plant. As a general rule, plan on one sachet per 3–6 linear feet of plant canopy for prevention. Dense or high-value collections benefit from tighter spacing. The Special Blend's broad-spectrum coverage allows for slightly wider spacing than single-species sachets.