FGMN Nursery
Triple Blend Nematodes for Broad-Spectrum Soil Pest Control
Triple Blend Nematodes for Broad-Spectrum Soil Pest Control
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Treating Soil Pests Without Sprays? Start Here.
Fungus gnats. Root weevils. Thrips pupae. Grubs. If it lives underground and damages your plants, this mix is built to end it.
Triple Blend Beneficial Nematodes
Three Species. One Goal: Wipe Out Soil Pests.
This blend combines three of the most effective species of entomopathogenic nematodes:
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Steinernema feltiae – Stays near the surface to target fungus gnat larvae, shore flies, and thrips pupae
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Heterorhabditis bacteriophora – Dives deeper to hit grubs, root weevils, and other root-feeding pests
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Steinernema carpocapsae – Attacks in the top layer of soil; great for cutworms, armyworms, and borers
Together, they deliver fast-acting, full-depth protection across a wide range of soil-dwelling pests.
What It Treats
| Pest | Life Stage Targeted |
|---|---|
| Fungus gnat larvae | Upper soil layer |
| Root weevils | Deep larvae |
| Grubs (Japanese beetles, June bugs) | Soil-dwelling stages |
| Thrips pupae | In substrate |
| Cutworms and armyworms | Topsoil-active larvae |
| Borers and fruit flies | Soil-pupating stages |
| And more | Covers over 200 soil pests |
Need specifics? See our full pest compatibility chart.
Why Use the Triple Blend?
| Feature | Benefit |
|---|---|
| Multiple species | Coverage at different soil depths |
| Fast kill time | Most pests die within 2–5 days |
| Self-replicating | Nematodes multiply inside hosts |
| Safe | No residue, no re-entry, no harm to pollinators |
| Easy to apply | Water-soluble powder mixes quickly and goes straight to work |
Whether you're running a greenhouse, grow tent, garden bed, or orchard, this blend works across crops and pest types—without needing a degree in entomology to deploy it.
Where It Works Best
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Soil temperatures: 53°F and up
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Environments: Greenhouses, indoor grows, raised beds, garden plots, field crops
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Humidity: Maintain even, damp moisture for 7–14 days post-application
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Light exposure: Apply early morning, evening, or on cloudy days (UV-sensitive)
How Much to Use
| Infestation Level | Coverage |
|---|---|
| Preventive / Light | 5 million nematodes per 300 sq. ft. |
| Moderate to Heavy | 5 million per 50 sq. ft. |
| Reapplication | Every 2–4 weeks if pressure persists |
Use higher rates or reapply more often in hot spots, propagation areas, or known problem zones.
How to Apply
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Pre-water soil before applying
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Mix nematode powder with 1–5 gallons of non-chlorinated water (59–69°F)
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Apply using a watering can, pump sprayer, or through irrigation
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Lightly water again afterward to move nematodes deeper into the soil
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Maintain even moisture for two weeks—don’t let it dry out
Pro Tips
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Avoid oversaturation—damp, not soaked
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No pesticides before or after—residue can kill nematodes
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Mix fresh. Once diluted, use within 6 hours
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Use consistently if you're breaking a heavy pest cycle
Shipping & Storage
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Ships refrigerated with live delivery guarantee
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Store at 35–50°F until use
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Do not freeze
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Once mixed with water, use within 6 hours
We offer fast and free shipping on most orders over $75 and $8.99 under $75. Orders are typically processed within 1-2 business days and delivered within 3-5 business days unless specified. Expedited shipping options and all pricing options are available at checkout if applicable.
We accept returns within 30 days of purchase. Items must be unused and in original packaging. To initiate a return, please contact our customer service team. Refunds will be processed within 5-7 business days after we receive your return.
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