How do I get rid of fungus gnats?

Oh Fungus gnats! They are the worst! You know, those stupid tiny black flies that keep buzzing around your plants? They're fungus gnats and in this post I'm going to tell you how to get rid of them for good!

Disclaimer - this post contains affiliate links for which I may gain a commission at no additional cost to you, if you use the links to purchase a product.

How did I get fungus gnats?

You brought a new plant home & it had fungus gnats or eggs in the potting mix
The gnats came in a bag of poor quality potting mix
Fungus gnats thrive in moist soil
They eat the roots of your plants

Treating a fungus gnat infestation

I recommend to use a two pronged approach:

1. Yellow sticky traps to catch adult fungus gnats and monitor the population (switch out these often)

2. Use Neem oil as a soil drench & spray to kill off fungus gnat larvae & eggs

3. All your plants potting mix to dry out & repeat steps 1 & 2 until eradicated

Prevention is better than cure:

Use a good quality potting mix

Ensure its well draining with added perlite or orchid bark

Only water your plants when they need it (usually when the top 3cm is dry to the touch)

Reduce watering in winter

Have you had fungus gnats in your houseplants?

About the Author Rachel Okell

A self confessed plant nerd, Rachel loves indoor plants, tropical plants and learning about new plants. Rachel is currently working as a Horticulturist helping people solve problems, pick plants & plan gardens. The best part of her job is being surrounded by plants all day! Rachel has a deep appreciation for all things green & hopes to share her knowledge and passion to help people learn about plants.

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