---
product_id: 134048540
title: "Sciarid Fly Nematodes Fungus Gnat Compost Fly Organic Natural Killer Treatment Treats 12.sqm"
brand: "gardening naturally"
price: "¥6437"
currency: JPY
in_stock: true
reviews_count: 8
category: "Gardening Naturally"
url: https://www.desertcart.jp/products/134048540-sciarid-fly-nematodes-fungus-gnat-compost-fly-organic-natural-killer
store_origin: JP
region: Japan
---

# Treats 12 sqm soil area Easy water-mix application Safe for kids, pets & wildlife Sciarid Fly Nematodes Fungus Gnat Compost Fly Organic Natural Killer Treatment Treats 12.sqm

**Brand:** gardening naturally
**Price:** ¥6437
**Availability:** ✅ In Stock

## Summary

> 🌿 Defend your plants naturally—because your green space deserves the best!

## Quick Answers

- **What is this?** Sciarid Fly Nematodes Fungus Gnat Compost Fly Organic Natural Killer Treatment Treats 12.sqm by gardening naturally
- **How much does it cost?** ¥6437 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/134048540-sciarid-fly-nematodes-fungus-gnat-compost-fly-organic-natural-killer)

## Best For

- gardening naturally enthusiasts

## Why This Product

- Trusted gardening naturally brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Broad Coverage:** One treatment covers up to 12 square meters of soil
- • **Eco-Friendly & Safe:** 100% organic, harmless to your family and environment
- • **Fast-Acting Solution:** Noticeable results after just one application—goodbye pesky flies!
- • **Targeted Pest Control:** Eradicates fungus gnat larvae before root damage begins
- • **Effortless Application:** Simply mix with water and pour—no mess, no fuss

## Overview

This organic nematode treatment targets and kills fungus gnat larvae in soil, protecting houseplants and seedlings from root damage. Covering up to 12 sqm, it’s easy to apply by mixing with water and is completely safe for children, pets, and wildlife. Store refrigerated and use within two weeks for maximum effectiveness.

## Description

Sciarid Fly Nematodes Fungus Gnat Compost Fly Organic Natural Killer Treatment Treats 12.sqm : desertcart.co.uk: Garden

Review: These are the only thing I’ve found to work - These are the ONLY thing that I’ve ever found to actually work on those tiny black flies on house plants. Just mix with water and pour on all of your house plants. I never really keep to the dosage. Just get them in a big jug of water and use it all up. I’ve had to use them a couple of times over the past few years as shop bought potting compost is tending to come with flies already introduced. But this stuff really does work very quickly. Great price.
Review: Effective treatment for pesky house plants flies - Had a problem with lots of little flies in my house plants. I tried fly spray but nothing stopped them until I tried this product. One application and problem solved. It's fairly expensive but really does do the job of you have those pesky flies in your house plants. Would definitely recommend.

## Features

- Sciarid fly (also known as fungus gnat or compost fly) is a troublesome pest of houseplants and plants in greenhouses and conservatories.
- The nematodes will kill the larva of the sciarid fly. The larva attacks the roots of plants and may cause the death of seedlings.
- Easy to apply, just mix with water then water the plant the nematodes into the soil. Treats 12 sq.m
- Completely harmless to children, pets and wildlife.
- This is a perishable product with an expiry date of about 2 weeks. Store in the fridge until needed.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07RRBX6Q7 |
| Best Sellers Rank | 967 in Garden ( See Top 100 in Garden ) 87 in Insect Control |
| Brand | Gardening Naturally |
| Brand Name | Gardening Naturally |
| Country of Origin | United Kingdom |
| Customer Reviews | 4.1 out of 5 stars 964 Reviews |
| Item Form | Sachet |
| Item Weight | 200 Grams |
| Item form | Sachet |
| Item weight | 200 Grams |
| Liquid Volume | 12 Litres |
| Liquid volume | 12 Litres |
| Manufacturer | Gardening Naturally |
| Specification Met | USDA |
| Specification met | USDA |
| Target Species | Fungus Gnat |
| Target species | Fungus Gnat |

## Product Details

- **Brand:** Gardening Naturally
- **Item form:** Sachet
- **Item weight:** 200 Grams
- **Liquid volume:** 12 Litres
- **Specification met:** USDA

## Images

![Sciarid Fly Nematodes Fungus Gnat Compost Fly Organic Natural Killer Treatment Treats 12.sqm - Image 1](https://m.media-amazon.com/images/I/515iUM6JEjL.jpg)

## Questions & Answers

**Q: Would this product also kill root aphids?**
A: Where it isnt mentioned in the list of " victims ", my problem with root aphids was considerably lessened using this product..

**Q: Can it be applied in November / December?**
A: If applying outside the soil temperature needs to be above 8 degrees Celsius however many people apply these indoors all year round.

**Q: What is the actual nematode in this product please?**
A: Its a predator of the fungus gnat in suspension powder .when mixed with water and put on plants soil it eats all the lavae of the scarid fly ,so you don't get them back. It lasts about 3 months.

**Q: Anyone know if these are the nematodes steinernema feltiae please? does it say on the package? i can't find any details in the description here online**
A: Yes they are!   Xx

## Customer Reviews

### ⭐⭐⭐⭐⭐ These are the only thing I’ve found to work
*by C***A on 28 November 2025*

These are the ONLY thing that I’ve ever found to actually work on those tiny black flies on house plants. Just mix with water and pour on all of your house plants. I never really keep to the dosage. Just get them in a big jug of water and use it all up. I’ve had to use them a couple of times over the past few years as shop bought potting compost is tending to come with flies already introduced. But this stuff really does work very quickly. Great price.

### ⭐⭐⭐⭐⭐ Effective treatment for pesky house plants flies
*by M***P on 30 November 2025*

Had a problem with lots of little flies in my house plants. I tried fly spray but nothing stopped them until I tried this product. One application and problem solved. It's fairly expensive but really does do the job of you have those pesky flies in your house plants. Would definitely recommend.

### ⭐⭐⭐⭐ Expensive but worth it
*by J***J on 7 August 2024*

I’d bought a bag of compost and it came with gnats. Didn’t realise how annoying they were and I lost a couple of plants. So last resort was to try this and it worked. Must keep the soil moist otherwise the little bugs will die. But did the job. Would recommend.

## Frequently Bought Together

- Sciarid Fly Nematodes Fungus Gnat Compost Fly Organic Natural Killer Treatment Treats 12.sqm
- aonova Fruit Fly Traps, Pack 30 Yellow Double-sided Fungus Gnat Sticky Catcher for Plants Indoor and Outdoor Insects Fly Control - Non-Toxic, Waterproof

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-27*