Special Blend Slow-Release Prevention Sachets
10% off your first 4 orders, then 50% off every order after.
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, russet 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, Russet 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 four 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 |
| Russet mites | All stages | Hoyas, cannabis, trailing aroids |
| Spider mites (T. urticae, T. pacificus) | All stages | Alocasia, citrus, ferns |
| Whiteflies | Immatures | Tomatoes, herbs, tropicals |
| 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 four compatible predatory mite species:
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Amblyseius swirskii – Targets thrips (eggs + larvae), whiteflies, broad mites, russet mites
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Amblyseius cucumeris – Thrips larvae, broad mites, cyclamen mites
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Amblyseius andersoni – Spider mites, broad mites, cyclamen mites; climate-flexible
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Phytoseiulus persimilis – Specialist spider mite predator (Tetranychus spp.)
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 persimilis 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 visibly wrong on arrival?
Sachets that arrived torn, soaked, or with a sour smell — take a photo and email info@fgmnnursery.com within 24 hours of delivery with your order number. We'll replace or refund without question.
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FAQ
What is your Live Delivery Guarantee?
We guarantee that your beneficial insects will arrive healthy and ready to work. Because we are shipping live organisms, we use packaging and expedited shipping to ensure their safety. In the rare event that your order is compromised during transit, please take a photo of the package and contact us within 24 hours of delivery so we can make it right.
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. Please email us at info@fgmnnursery.com and we'll be happy to help!
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.
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.
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.
Easy to use , did the trick
I have not seen any activity at all with the sachets.😞
Hi Mary — thank you for sharing this. This is actually very common with sachets and doesn’t mean they aren’t working.
Predatory mites are microscopic (smaller than a grain of dust), and sachets are designed to release them slowly over time rather than all at once. Because of their size and how they disperse, they’re almost never visible to the naked eye. The goal with sachets is quiet, ongoing prevention — not visible activity.
If you’re not seeing new pest damage, webbing, or population spikes, that’s typically the best sign they’re doing exactly what they’re supposed to do.
We really appreciate you taking the time to leave feedback, and we’re always happy to help if you want to double-check placement or timing.
I'm going to start by giving you five stars great idea grow pot And don't like to spray . If this works your smart 🤓. And I' m buying lots more .
The sachets shipped quickly and were well packaged. I had had them for about 2 weeks now and I don’t see any movement of beneficial bug, and I check daily. I don’t know how long they take to start leaving the sachet but it hasn’t happened yet, I’m thinking this shipment may have been a dud.
Hi Teri!
Thank you for the review! The sachets are an excellent preventative that works with about 5-6 mites reaching adulthood per day and walking out those holes. Very, very few people ever see the mites. In fact, that dust you may have noticed in the bag when you opened it? Those were mites that walked out in shipping-- that's how small they are (don't worry, we ship more than promised to ensure the ones that die in shipping are covered). If you are someone that always wants to see the mites, my suggestion is to always buy the bottles. Even then with certain types you may not see them, but you have a greater chance. Thank you again for the review!
Arrived on time and were packaged great! They seem to be doing what they’re supposed and I’m very satisfied
Fast shipping
Fast shipping, super helpful team! I will order again to avoid chemicals!
They sent the mites in these huge very thin paper sachets different from the last batch i ordered. They are so thin and flimsy that they wont stay on the plants bc the paper cant hold the weight. Not to mention the humidity in my grow tent makes them even less durable. So many were ruined bc they fell off the plants into condensation even tiniest bit of moisture or humidity made the bags weak n rip. I don’t understand why they made these ones so big and thin ad befores. Also be prepared as shipping takes quite a while and you have to use the sachets within 24 hrs of arrival so order exactly what you think you need quantity wise
Thank you for sharing your experience. Sachets can look a little different depending on the predatory mite species, but they’re all designed with the same goal: to provide a steady release of predators for 2–4 weeks.
Because the mites inside are living, sachets should always be hung within 24 hours of arrival so they can get to work right away.
We’ll also look into whether different materials are being used between batches. That’s great feedback — clearly this style didn’t work well in your environment, and it’s helpful for us to know.
In the future reach out to us and we’ll check to see if the type of mite that you’re ordering can be put into the type of sachet that you prefer. Admittedly that may extend your wait as we propagate for the healthiest mite, and may need to propagate a new order that thrives in that sachet, but we’re happy to look into it
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