Special Blend Slow-Release Prevention Sachets
Biological control is a programme, not a single release. A subscription puts the next one on its way before the last one runs out.
Skip a box, change how often it comes, or stop it — all from your account.
Heads up—this is just an estimate. We only ship when the bugs are happy and ready to travel (Mon–Thurs). If a colony needs a beat to peak, or we're propagating a fresh batch, your order might hold up to a week. Treatment bottles jump the line when you've got an active infestation.
Special Blend Slow-Release Prevention Sachets
At A Glance
How Do You Keep Spider Mites And Thrips From Coming Back?
You cleared the thrips. The webbing’s gone. That twisted new leaf finally unfurled normally.
Now what?
You’ve seen how fast spider mites, broad mites, cyclamen mites, and thrips can spiral out of control—and you don’t want to go through that again. These sachets are how you stay ahead of it.
Biological Pest Prevention for Spider Mites, Broad Mites, Cyclamen Mites, Thrips, and More
These sachets release live predatory mites gradually over 3–5 weeks to prevent pests from establishing in the first place. No sprays. No mixing. No guesswork.
If you’ve ever dealt with an infestation—or just want to avoid one—this is your slow-release insurance.
Each sachet contains three species of beneficial mites, selected to cover multiple pests, microclimates, and plant types. The mites emerge over time, spread throughout your foliage, and quietly take out pests while they’re still in egg or larval form.
You won’t see the mites. You also won’t see the pests. That’s the point.
What It Prevents
| Pest | Targeted Stage | Common Hosts |
|---|---|---|
| Thrips | Eggs and larvae | Syngonium, Philodendron, Calathea |
| Broad mites | All stages | Anthurium, African violets, Peperomia |
| Spider mites (T. urticae, T. pacificus) | All stages | Alocasia, citrus, ferns |
| Whiteflies | Eggs and crawlers only | Herbs, tropicals — not tomato, where swirskii cannot establish |
| Cyclamen mites | All stages | Begonias, ferns, curled foliage |
| Other soft-bodied mites | Varies | Common in mixed indoor collections |
This mix is especially helpful if:
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You aren’t sure what pests you’ll be dealing with
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You’ve cleared an infestation and want protection
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You grow in a warm, humid space with lots of foliage
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You want to stop spraying and try natural prevention instead
What's Inside
Each sachet contains a balanced mix of three compatible predatory mite species:
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Neoseiulus californicus – Spider mites, broad mites, cyclamen mites; tolerates drier air
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Amblyseius swirskii – Targets thrips (eggs + larvae), whiteflies, broad mites
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Amblyseius cucumeris – Thrips larvae, broad mites, cyclamen mites
Each species plays a different role—some dominate in heat, others tolerate cold. Some feed on eggs, others on mobile juveniles. Together, they give you coverage across pests before damage is visible.
How It Works
Sachets are designed for biological slow-release. Each one contains a mix of:
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Adult predatory mites
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Juveniles
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Eggs
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A food source (bran + supplemental feed)
Here’s what happens:
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Mites exit the sachet gradually through the vent
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They crawl onto leaves and stems, seeking pest eggs and larvae
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Adults feed and reproduce
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New generations emerge and continue hunting
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Coverage lasts 3–5 weeks depending on temperature and humidity
No spraying. No reapplication during the active release period.
How to Use
| Setup Type | Suggested Use |
|---|---|
| Houseplants | 1 sachet per plant |
| Grow tents or shelves | 1 sachet every 2–3 feet |
| Dense canopies or greenhouses | 1 sachet per cluster or per square foot |
| After bottle treatment | Begin sachets 5–7 days later |
| Ongoing protection | Replace every 3–5 weeks |
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Do not open the sachets. Mites exit naturally through the release hole.
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Hang sachets near foliage, but above the watering line—do not soak.
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Works under both grow lights and natural light.
Best Conditions for Success
| Factor | Ideal Range |
|---|---|
| Temperature | 70–85°F |
| Humidity | 60%+ (especially for swirskii and cucumeris egg hatch) |
| Light | Effective under artificial or natural lighting |
| Airflow | Moderate is fine; avoid blasting fans on sachets |
If your environment is dry, mist near (not on) plants or use a humidifier to improve mite emergence and reproduction.
Pro Tips
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Start early. Don’t wait for visible pest symptoms—these are for prevention.
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Pair with Good Bug Diet if you’re using sachets preventatively in low-pest conditions.
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Use sachets after bottles to maintain control after knockdown.
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Avoid contact sprays. Even organic ones can harm beneficial mites.
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Stay on schedule. Especially during spring, summer, and early fall.
Safe for Indoor and Edible Use
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Non-toxic
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Zero re-entry interval
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Pet- and pollinator-safe
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Compatible with organic growing and IPM systems
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Won’t harm soil microbes, fungi, or beneficial insects
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Invisible to the eye and residue-free
Shipping & Storage
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Ships 2-Day with tracking
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Use on arrival for best results
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Store up to 48 hours at 50°F if delayed
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Do not freeze or leave in hot, dry conditions
Target Pests
Environmental Needs
Selection Guide
How to Use
How They're Shipped
Hang them up, then wait.
How to deploy your sachets, and how to read the results over the next few weeks. Sachets are prevention — a slow-release nursery that ramps up over weeks, not a quick knockdown for an active outbreak.
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01
Open the box right away
Bring the package indoors as soon as it arrives. Don't leave it on a hot porch, in a cold mailbox, or in direct sun. If you can't deploy immediately, set the sachets somewhere room-temperature (60–75°F) and out of direct light — they'll keep for a day or two.
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02
Don't open the sachet
Each sachet is a self-contained breeding colony. The mites and their food source live inside; they emerge gradually through a small exit hole on the breathable face. Cutting the sachet open ends the slow release and dumps the colony all at once. Keep them sealed.
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03
Hang or place near the plant
Hook each sachet on a sturdy branch, hang from a stake, or set near the base of the plant — out of direct sun and away from anywhere it'll get watered. Mites travel from the sachet onto the plant on their own. One sachet protects roughly 2–3 feet of canopy; see the product description for exact spacing.
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04
Leave them alone for 4–6 weeks
Predator emergence ramps up over the first two weeks, peaks around weeks three to four, and tapers off through week six. You won't see the predators (they're smaller than a grain of salt), and an "empty-looking" sachet at week one means nothing. The real signal is what isn't happening — pests not establishing on protected plants.
Something not quite right?
Reach out to our entomologist by filing a report within 72 hours of delivery, with your order number and a photo. Candidly, without a photo the team can't approve a live beneficial claim.
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FAQ
What is your Live Delivery Guarantee?
We guarantee that your beneficial insects arrive healthy and ready to work. They're living things, so we pack for the season and ship expedited to give them the best trip we can.
If something looks wrong when the box opens, take a photo and file a report within 72 hours of delivery, with your order number. Photos matter: candidly, without them the team can't approve a live beneficial claim.
How long does one Special Blend sachet actively release mites?
Can I use Special Blend sachets alongside other biological controls?
Will the mites spread throughout my home?
Do these mites bite humans or pets?
Can I use Special Blend sachets year-round?
How do I know if the sachet is still active?
Help! I'm overwhelmed
Yeah, it's a lot the first time you're using predatory mites. File a report and our bug pros will walk you through it!
I don’t see anything moving in my bottle or sachet. Does that mean they’re dead?
Not at all! In fact, go ahead and deploy them.
Predatory mites are microscopic (often less than 0.5mm) and naturally blend into their carrier medium (bran or vermiculite).
- For Bottles: The mites often huddle in the center of the bottle for insulation during transit.
- For Sachets: These are "slow-release" nurseries. The mites stay tucked deep inside the breeding media and emerge one by one over 2–4 weeks. Seeing an "empty-looking" sachet or bottle is not proof of a loss; it is simply how they are packaged for maximum survival.
I feel safe knowing I have a microscopic army at work in my greenhouse.
Exactly what I needed for my plant kids! Thank you so much.
I see the care FGMN put into handling and packaging before handing it off to UPS; however, UPS did not care as much. The box arrived with significant dents in two sides and the cold pack was wasrm to the touch and warmer than the outside air (upper 70s or lower 80s). As the mites are tiny and there were several life stages, I am hoping they made it through okay and are feasting on spider mites now.
Oh no! Let's start with the mites first-- luckily they'll be just fine in those temps (they actually prefer them). Warm ice pack and all, they're actually pretty hardy. But of course..... what the heck UPS? Did you drive over the box?
That damage may qualify you for a UPS claim. If you'd like us to file one, please email your order number and the pictures at info@fgmnnursery.com and we'll take it from there.
Rest assured, if you don't want to go through the trouble the mites are good and we have the live guarantee if you at all suspect they're not. Just let us know at that same email listed above.
Thank you for shopping with us! We appreciate all the time and care you put into your plants and choosing us to be a partner in that.
I’m using the slow release packets in a small unheated greenhouse and they appear to be working just fine. Thanks for your product.
So far so good. Working as advertised.
Quick shipping, effective packaging, and lots of useful information included on the product and more. Everything seems to be good even though the main bag they came in was open! Thank you!
I bought these when I bought some lady bug and lace wing infestation outside. I wasn’t expecting much but the plants I placed them on seemed to be doing better. Will get another batch.
They seem to be doing their job. Can't really seem them, as its supposed to be.
Looked at the critters under a microscope. They look happy and healthy. Pretty sure Isaw a couple of the dancing the Mambo!
LOL They’re learning! They were only do the Salsa last month. Thank you!
I got these as a preventative because I’m always freaking out about insects and worried about pests on my plants. I’m a new plant owner so I’m trying to do everything right. These sachets give me peace of mind. If I look very closely, I can see the predatory mites occasionally, crawling around on the sachets and my plants, and it doesn’t freak me out at all. I like knowing they’re there. I opted for a monthly subscription because I always want to have them around. I have about 30 plants (some obtained after my mite order) so I’m going to increase the number of sachets.
These work great! I love the upgrade to brown pouches instead of white, however I find that with the white pouches, you could shine a light and see your mites moving around inside upon arrival. Now that the pouches are brown, the material is too thick to do so. If there was a way to keep the rustic look of the brown and have the ability to greet my mites upon arrival again, that would be ideal. Overall, I can't really complain, because they still do their job and look like much less of an eyesore hanging on my plants. Happy to have my mites!
This is the perfect way to keep the pests under controll
Everything arrived fine still waiting for results it has only been a week since I received the item. It is a slow release so I am waiting to see results
First time ever ordering beneficial insects and I can’t believe how easy this was definitely gonna order again
First time trying beneficial bugs for my plants, the ones that were ready got to work and I look forward to continuing to use them on my plants!
Great stuff! Helps keep my plants pest free. I’ve bought their preventative sachets twice (once every 5-6 weeks) and haven’t had a single pest incident even though I’ve brought home many, many new plants in this period. Will definitely buy again!
Really easy to apply. Litterally just hang on your plant. Hoping this helps keep little pests away
Everything arrived pretty quick and packaged nice. They seem to be doing their job.
Fast shipping! I can't see the bene's so I'm assuming they're doing their job! I'll be back for more when needed!
They were alive and already coming out of the sachets when I opened the bag. However, the sachets only had a small hole, and I wasn’t sure how to hang them on my plants at first. I had to go back to the website for instructions and realized I needed to cut a slit on the side to hang them properly. Once I did that, they worked perfectly! I’ll definitely be ordering more!!
I lost my entire anthurium collection to spider mites. Despite trying everything (neem, alcohol, you name it), I lost that.battle. The philodendrons were next and I gave these guys a chance. Customer for life.
Amazing experience! The beneficial mates work, and the customer service and quality is top-notch unmatched and will definitely keep using them going forward you’ve got a customer for life!
Ordering process was great. Haven’t seen any new damage.
Recieved my order on time, good communication and instructions from company. I think i see small bugs but time will tell if they protect from my roses from my spider mite issue
Great product. Worked where sprays and oil treatments did not.
Everything is dead
Hi Donna,
We want to clarify that your order did not arrive dead. The species purchased were not the correct predators for the pest issue present, which can make them appear inactive or ineffective in that context.
We reviewed your case carefully and, despite this being a product-selection issue rather than a product-quality issue, we issued a full store credit for the entire order.
We’re always happy to help match the right predators to the right pest so you see the results you expect.
I never saw any of the predatory mites, but the evidence I had of spider mites never showed up again. Low maintenance, natural option for an indoor hydroponic Gardyn.
Mite Matters
Thrips Have Six Stages. Cucumeris Reaches One.
A thrips passes through six life stages and cucumeris can kill one of them. Second instars do not just survive the attack — they fight it off, and they destroy the predator's eggs on the way past. That single fact explains the lag, the reservoir, and most of the disappointment.
Four Predatory Mites, Compared. Two of the Columns Are Guesses.
Every supplier prints the same four-column comparison table. We went and read the papers behind each cell. One column rests on unpublished company data, one species has never been trialled against thrips at all, and the humidity row is backwards. Here is that table with the guesses marked.
Your Cucumeris Are Alive. Your Thrips Are Winning.
Your mites are alive. Your thrips are also alive. That combination has twelve documented causes, and what the mites are doing — where they are, what they are sitting next to — narrows it to one or two in about five minutes.