Description
Long life fungus gnat nematodes (20m²) offer a gradual-release method for managing fungus gnat larvae in compost and soil. Designed for use around houseplants, greenhouse crops, and outdoor containers, they help reduce larvae in damp growing media where infestations develop.
The product is supplied as small gel-based pearls containing beneficial nematodes, so no mixing is required. After watering, the pearls slowly break down, releasing nematodes into the compost where larvae are present.
Suitable for both indoor and outdoor use.
Fungus gnat nematodes for pots, containers and indoor plants
Fungus gnats commonly develop in consistently damp compost, particularly around seedlings and houseplants. These nematodes are applied to the soil surface around plant stems, helping target the area where larvae live and feed.
Each pack contains approximately 10 million nematodes, including a mix of Steinernema feltiae and Steinernema carpocapsae.
How the nematodes work in compost
The pearls hold thousands of microscopic nematodes within a gel coating. When watered, the coating softens and releases them gradually into the soil, allowing them to move through the compost without the need for liquid preparation.
Reapplication guidance
To maintain control, repeat treatments are recommended. Reapply every few weeks or when needed, particularly in warm indoor conditions where fungus gnats are more active.
The extended shelf life allows you to store the product and apply it when required rather than all at once.
Application method
Apply around 5g per plant (approximately half a teaspoon) to the compost surface near the base of the plant. Water thoroughly after application.
Keep the compost moist for three to four weeks to support movement through the growing media.
When to apply
Apply during cooler conditions such as evening or when weather is cloudy or damp. Soil temperature should be at least 5°C.
Indoors, timing is flexible. Outdoors, application is most effective between April and August.
Suitable growing areas
Can be used across a range of planted environments, including houseplants, greenhouses, conservatories, patio containers, and planters where fungus gnats breed in moist compost.
Pack size and coverage
This pack weighs approximately 280g and covers up to 20m² or around 50 plants, depending on application rate.
The contents can be used in portions, allowing treatment of smaller areas over time.
(Current batch expires 03/08/2026)
No refrigeration required.
Storage guidance
Store in a cool place in the original breathable packaging. Keep away from heat, direct sunlight, and do not seal in airtight containers. Refer to the expiry date on the pack for storage limits.
Frequently asked questions
What does “long life” mean?
This refers to the extended storage period. Unlike standard nematodes that need to be used quickly, this format allows flexible use at any time before the expiry date.
Do I need to reapply?
Yes, repeat applications are needed to maintain effectiveness, especially in warm indoor environments where fungus gnats persist.
What are these nematodes used for?
They are designed to target fungus gnat larvae in compost and soil around potted plants and other planted areas.
Do they need mixing before use?
No, they are ready to apply. Simply sprinkle onto moist compost and water in.
How much should I use?
Apply approximately 5g per plant around the base on the soil surface.
How long should the compost stay moist?
Keep the compost damp for three to four weeks after application.
Can they be used indoors?
Yes, they are suitable for both indoor and outdoor environments.
What area does one pack treat?
Each pack covers up to 20m² or roughly 50 plants, depending on usage.