You’ve probably encountered fungus gnats if you own houseplants. If not, give it time. These pests are irritating and can cause trouble if not dealt with properly. Like all pests, it’s a lot easier to prevent fungus gnats than it is to get rid of an infestation. Here’s how to prevent fungus gnats.

Know What You’re Up Against

There are actually seven different families of insects that are categorized as fungus gnats. All of them are trouble for houseplants. The steps to prevent or get rid of fungus gnats are the same, regardless of the variety. 

These pests seek out consistently wet soil because it helps ensure their offspring and future generations survive. Fungus gnats lay their eggs in wet soil, so when they hatch, the larvae can eat the fungus growing in the damp conditions.

Mature gnats measure up to 8 millimeters long and only live for about 10 days. Their quick life cycle is a big part of what makes it so hard to eliminate fungus gnats. As soon as you kill off one generation, another one is right behind them. Killing fungus gnats can feel like an ongoing battle because it sort of is, and that’s why taking steps to prevent the problem is a much easier approach.

Prevention Strategies

Prevention allows you to avoid the entire hassle. Here’s what you need to do to keep fungus gnats from showing up.

• Check the soil when purchasing new plants. Tap the pot and see if anything flies around. Think long and hard before bringing an infested plant home. You can quarantine a new plant to protect existing plants, but it may not be worth the risk.

• Routinely inspect your plants, including the soil. Take time each month or whenever you remember to look at leaves, stems, and potting soil for signs of pests or damage. Yellow leaf tips indicate overwatering. By the time the plant is reacting to this problem, you’ve created the perfect fungus gnat habitat.

• Inspect plants that have been outdoors or on a screen porch before bringing them inside. While plants make an outdoor space feel cozy and welcoming, it’s also an opportunity for pests to move in. Even if you routinely check your plants, definitely inspect things before moving a plant back inside.

• Get to know the plant and only water when necessary. Check the soil to gauge the dampness, and use a moisture meter if you’re unsure when to water.

• Always use containers with drainage holes and appropriate soil that matches the plant’s needs.

Stay Pest Free

Fungus gnats can happen despite your best efforts, but don’t make it easy for these pests. Proper houseplant care is the best thing you can do to keep pests away and ensure your plants are healthy and thriving.