Multi-Pest Control for Variable Climates
The All-Weather Generalist.
If you’ve dealt with mites before, you know the drill: the damage shows up fast, the webbing follows, and suddenly you’re in full-blown rescue mode.
Amblyseius andersoni is the predator that stops that cycle before it spins out of control. While other beneficial mites require perfect greenhouse conditions to survive, Andersoni is built for the real world—where temperatures fluctuate, humidity drops, and pests don't play by the rules. These slow-release sachets deliver consistent, preventative coverage against a broad spectrum of mites, functioning effectively from cool spring mornings to hot summer afternoons.
How It Works: The Versatile Survivor
Amblyseius andersoni is a polyphagous (generalist) predatory mite. It doesn't just hunt one thing; it patrols your plants looking for a wide variety of prey.
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Wide Temperature Range: Unlike Persimilis (which hates heat) or Swirskii (which hates cold), Andersoni remains active between 42°F and 100°F.
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Dietary Flexibility: If pest populations are low, Andersoni can survive on pollen, fungal spores, and thrips larvae, keeping the population alive and ready for when spider mites inevitably show up.
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Sustained Release: Each sachet acts as a breeding colony, releasing eggs, nymphs, and adults continuously over 2–4 weeks.
Targeted Pests
Andersoni is your best option for "broad-spectrum" prevention when you aren't sure exactly which mite is attacking, or when you are dealing with multiple species at once.
| Target Pest | Scientific Name | Targeted Signs |
| Spider Mites | Tetranychus spp. | Webbing, stippling, leaf speckling |
| Broad Mites | Polyphagotarsonemus latus | Twisted, hardened new growth |
| Russet Mites | Aculops lycopersici | Bronze, rough-textured leaves ("hemp russet") |
| Cyclamen Mites | Phytonemus pallidus | Deformed growth at the crown |
| Eriophyid Mites | Eriophyidae | Blistering or unexplained leaf curl |
When to Choose Andersoni
Use this predator when your environment is too harsh or unpredictable for other mites.
Ideal For:
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Variable Environments: Garages, unheated greenhouses, or outdoor crops where temps swing from 40°F at night to 90°F+ during the day.
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Early/Late Season: Perfect for spring and fall protection when it is too cold for Swirskii.
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preventative "Stacking": Works excellently alongside Phytoseiulus persimilis to catch what the specialist misses.
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Ornamentals: Great for broad mite protection on Hoyas, Begonias, and other tropicals.
Application Instructions
Hang High, Keep Dry.
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Preventative Rate: 1 sachet per plant (for large plants) or 1 sachet every 3 feet (for canopy/rows).
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Placement: Hang on the main stem, stake, or trellis near the plant canopy.
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Maintenance: Do not open the sachets; mites exit through a pre-engineered vent.
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Care: Avoid direct misting or heavy irrigation on the paper sachet itself.
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Frequency: Replace every 2–4 weeks depending on pest pressure.
Pro Tips
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Don't wait for webs: This is a shield, not a rescue. Deploy Andersoni early in the season or immediately after a knockdown spray.
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Skip the chemicals: Residue from pesticides (even some organic oils) can kill these predators. Stop spraying at least 2 weeks before deployment.
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The "Generalist" Strategy: Because Andersoni eats pollen, you can hang them on flowering plants even before you see pests. They will establish a colony and wait for the bad guys to arrive.
Shipping & Storage
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Freshness: Ships via 2-Day Air with a live arrival guarantee.
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Usage: Hang immediately upon arrival for best results.
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Storage: If necessary, store at 45–55°F for up to 48 hours.
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Warning: Do not store in a standard refrigerator or freezer (low humidity kills them).
FAQ
How does the Live Guarantee work?
We know how important it is for your mites to arrive healthy and ready to work. That’s why we offer a live arrival guarantee—with flexible options depending on when we hear from you:
- Let us know within 24 hours of delivery: We’ll gladly send a free replacement shipment.
- Let us know within 2–3 days of delivery: We can offer store credit to make things right.
- After 3 days from delivery: Because these are living organisms, we’re not able to offer replacements or credit beyond that window. By then, it’s harder to know what went wrong or whether shipping conditions were a factor.
We truly want your mites to succeed—so please open your package as soon as it arrives and check on them. If something doesn’t look right, don’t wait—reach out and we’ll take care of you.
Where are you located?
We have a number of different locations in NJ, Maine and Oregon. While we'd love to have you, we are not currently open to the public.
Can I call you?
We get it. Sometimes it's easier to talk to someone, and on a case by case basis we can try to figure it out. Unfortunately though, we're really not able to take calls—FGMN is a small nursery, and we're usually elbows-deep in plants or packing boxes. To make sure nothing gets missed (and everyone gets a timely reply), we keep all communication in writing.
Feel free to message us at info@fgmnnursery.com. We mostly respond quickly, but every once in awhile replies may take a day. Do follow-up if you don't hear in that time. We're human, we miss an email here or there.
Too Many Options?
We get it. Try our mite/insect matchmaking quiz and instantly get matched to the solutions you may need.
Our Live Delivery Guarantee
We stand behind every leaf and every mite. If your plant or predatory insects don’t arrive alive on the first delivery attempt, we’ll make it right.
Here’s what you need to know:
- Email us at info@fgmnnursery.com within 24 hours of delivery
- Include clear photos of the item and the shipping label
- Someone must be available to receive the package—plants and bugs don’t do well sitting in the sun, a mailbox, or the back of a delivery truck
For plants, we offer store credit if something goes wrong.
For predatory mites and beneficial insects, you’ll have the choice of a replacement shipment or store credit.
If you contact us after the 24-hour window, we may still be able to help—just know it’s handled case by case.
We pack with care, insulate when needed, and check the weather before shipping. But once it’s in transit, the fastest way to protect your order is to open it right away.
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