Product description
For When You Want the Soil to Handle It
If fungus gnats, thrips pupae, or root aphids are crashing the party below the surface, Steinernema feltiae is how you politely kick them out. These microscopic roundworms hunt through the soil, slip inside pest larvae, and release symbiotic bacteria that take them out from the inside. It’s not pretty—but it works.
Once they’ve handled one host, they reproduce and go looking for more. Give them a bit of moisture and a manageable temperature range, and they’ll keep working long after the first application.
Best For:
Fungus gnats
Thrips (pupal stage)
Root aphids
Scarab grubs, weevil larvae, flea larvae, and dozens of other soil-dwelling pests
Why Choose the Easy-Release Powder?
Fast action. Infective juveniles start working within days.
Sustained control. They reproduce underground for ongoing suppression.
Cool-weather champs. Still effective at soil temps as low as 46°F.
Easy to mix. Quick-dissolving formula makes even application simple.
How to Use
Water the soil before applying—moisture helps nematodes move.
Mix powder into water according to your coverage needs.
Apply with a watering can, hose-end sprayer, or backpack sprayer.
Keep soil lightly moist for 2 weeks after application.
Avoid applying in full sun or extreme heat.
How Many You Need
Preventative Light Infestation: 5 million per 300 sq. ft.
Moderate to Heavy Infestation: 5 million per 50 sq. ft.
Environmental Sweet Spot
Soil temps: 46–86°F
Moisture: Essential—don’t let the soil dry out
Not fans of soggy or flooded conditions (they drown)
UV-sensitive: Apply in the early morning, evening, or on cloudy days
Safe for... Everything You Want to Keep Alive
Totally harmless to people, pets, plants, and beneficial insects.
They only go after pests—no collateral damage.
Storage & Shelf Life
Store refrigerated at 35–50°F (not frozen)
Use within 30 days
Once mixed with water: Use within 6 hours
Pro Tips
Reapply weekly to monthly if pest pressure is high
Combine with above-ground predators for full-spectrum control
Compatible with organic and regenerative systems
Shipping & policies
Estimated shipping date: To be calculated
Ships from: Hackettstown , NJ
Shipping fee: Free
Sales tax:
. We're required by law to cullect sales tax and applicable fees for certain tax authorities.
. Sales taxes vary depending on state.
Returns and exchanges:
. Returns and exchanges are not accepted.
Product description
For When You Want the Soil to Handle It
If fungus gnats, thrips pupae, or root aphids are crashing the party below the surface, Steinernema feltiae is how you politely kick them out. These microscopic roundworms hunt through the soil, slip inside pest larvae, and release symbiotic bacteria that take them out from the inside. It’s not pretty—but it works.
Once they’ve handled one host, they reproduce and go looking for more. Give them a bit of moisture and a manageable temperature range, and they’ll keep working long after the first application.
Best For:
Fungus gnats
Thrips (pupal stage)
Root aphids
Scarab grubs, weevil larvae, flea larvae, and dozens of other soil-dwelling pests
Why Choose the Easy-Release Powder?
Fast action. Infective juveniles start working within days.
Sustained control. They reproduce underground for ongoing suppression.
Cool-weather champs. Still effective at soil temps as low as 46°F.
Easy to mix. Quick-dissolving formula makes even application simple.
How to Use
Water the soil before applying—moisture helps nematodes move.
Mix powder into water according to your coverage needs.
Apply with a watering can, hose-end sprayer, or backpack sprayer.
Keep soil lightly moist for 2 weeks after application.
Avoid applying in full sun or extreme heat.
How Many You Need
Preventative Light Infestation: 5 million per 300 sq. ft.
Moderate to Heavy Infestation: 5 million per 50 sq. ft.
Environmental Sweet Spot
Soil temps: 46–86°F
Moisture: Essential—don’t let the soil dry out
Not fans of soggy or flooded conditions (they drown)
UV-sensitive: Apply in the early morning, evening, or on cloudy days
Safe for... Everything You Want to Keep Alive
Totally harmless to people, pets, plants, and beneficial insects.
They only go after pests—no collateral damage.
Storage & Shelf Life
Store refrigerated at 35–50°F (not frozen)
Use within 30 days
Once mixed with water: Use within 6 hours
Pro Tips
Reapply weekly to monthly if pest pressure is high
Combine with above-ground predators for full-spectrum control
Compatible with organic and regenerative systems
Shipping & policies
Estimated shipping date: To be calculated
Ships from: Hackettstown , NJ
Shipping fee: Free
Sales tax:
. We're required by law to cullect sales tax and applicable fees for certain tax authorities.
. Sales taxes vary depending on state.
Returns and exchanges:
. Returns and exchanges are not accepted.
Accepted payment methods
Shop Reviews
Communication
•
193
Quick shipper
•
268
Great packaging
•
275
Item as described
•
271
Fair pricing
•
242
Friendly
•
214
Understanding
•
156
On time meet-up
•
35
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