Fungus Gnat Nematodes 12m² Gardening Naturally

Fungus gnat nematodes are a natural way to eliminate larvae from soil around indoor plants stopping the tiny irritating flies. These microscopic organisms (Steinernema feltiae) actively seek out and destroy fungus gnat larvae below the surface.

Helps Reduce Tiny Flies Around Indoor Plants

Fungus gnats can be a nuisance in homes, greenhouses, and indoor gardens. Adult flies are harmless but their larvae feed on organic matter and plant roots, causing weak growth. Applying nematodes directly to the soil helps address the problem at its source, preventing further infestation.

These nematodes are suitable for use in households with pets and children and can be applied to pots growing herbs, fruit or vegetables. There is no need to delay harvesting after application.

Mix the nematodes with water and pour onto moist compost or soil. Apply year-round indoors or use outdoors between April and August when fungus gnats are most active. For continued protection, reapply as needed, especially in warm and humid conditions.

Stop Tiny Houseflies, Ideal for Pots, Planters and Indoor Containers

Use this product for indoor plant pots, conservatories, greenhouses, or raised containers. One pack treats up to 12m², providing thorough coverage for home growers and plant enthusiasts.

Frequently Asked Questions for Fungus Gnat Nematodes 

What are fungus gnat nematodes and how do they work?

Fungus gnat nematodes are microscopic beneficial organisms (Steinernema feltiae) that naturally target and kill fungus gnat larvae living in the soil of indoor and potted plants. They help stop tiny flying gnats by breaking the breeding cycle at the root level.

How do fungus gnats harm indoor plants?

Fungus gnat larvae feed on organic matter and plant roots in the soil, which can lead to weakened growth, yellowing leaves, and poor plant health — especially in seedlings or young plants.

Are fungus gnat nematodes safe for use around pets and children?

Yes, these nematodes are completely safe for use in homes with pets and children. They contain no chemicals and pose no harm to humans, animals, or beneficial insects.

Can I use fungus gnat nematodes on edible plants and herbs?

Absolutely. Fungus gnat nematodes can be used on potted herbs, fruit, and vegetables. There’s no need to delay harvesting after applying them.

When is the best time to apply nematodes for fungus gnat control?

Indoors, nematodes can be applied year-round. Outdoors, they’re best used between April and August when fungus gnats are most active. Reapply as needed in warm or humid conditions.

How do I apply fungus gnat nematodes to my plants?

Mix the nematodes with water and pour directly onto moist compost or soil. Focus on the top layer of the potting mix where larvae live and feed.

How much area does one pack of fungus gnat nematodes treat?

One pack treats up to 12 square metres, making it ideal for treating multiple indoor pots, planters, conservatories, or greenhouse trays.

Do I need to change my plant care routine after applying nematodes?

You can continue regular watering and care. However, reducing overwatering and improving drainage will enhance effectiveness and prevent future gnat problems.

What are the signs of a fungus gnat infestation in houseplants?

Look for small black flies hovering around the soil surface and signs of larvae in the top layer of moist soil. Damage to roots may cause wilting or stunted growth.

Can I combine fungus gnat nematodes with sticky traps?

Yes, yellow sticky traps are a great companion to nematodes. Traps catch adult gnats while nematodes target the larvae, offering complete control above and below the surface.

How often should I reapply fungus gnat nematodes?

Reapply every few weeks or as needed, especially in warm, humid indoor environments where gnats tend to thrive.