Soil Bugs Identification — Springtails, Earwigs, Millipedes & More

Not all bugs in your plant soil are harmful. Learn to identify common soil-dwelling insects like springtails, earwigs, and millipedes, and know which are beneficial and which need treatment. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: Springtails are tiny white or grey jumping insects in soil that feed on decaying organic matter — they are beneficial, not pests. Millipedes are dark multi-legged arthropods that eat dead plant material — also beneficial decomposers. Fungus gnat larvae are small white worms in the top inch of soil that feed on roots and fungi. Earwigs are brown pincer-bearing insects that occasionally shelter in damp soil but rarely damage houseplants. Most small soil arthropods are decomposers that actually improve soil health by breaking down organic matter. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Moist organic potting soil naturally supports populations of decomposer organisms. Overwatering creates conditions favoring fungus gnats which are the most problematic soil insect for houseplants. Springtails and millipedes indicate healthy soil biology and are signs of good growing conditions. Bringing plants indoors from outdoors can introduce soil-dwelling insects that are noticed more inside. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Identify the insect before treating — not all soil bugs are pests and beneficial ones should be left alone. For springtails, do nothing — they are beneficial decomposers that indicate healthy moist soil conditions. For fungus gnats, let the top 1-2 inches of soil dry between waterings and use sticky traps for adults. For earwigs or pillbugs, remove manually — they shelter in moist soil but rarely cause damage to houseplants. If you are uncomfortable with any soil insects, allow the soil to dry more between waterings which reduces all populations. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Plant Care Guides collection on Houseplants Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.