Earwigs on Cannabis: Identify Damage Before Treating
Earwigs hide in dark, damp spaces during the day and feed mostly at night. They may chew cannabis seedlings, soft leaves, or flowers, but they also eat decaying material and other small pests, so seeing one in the grow area does not prove it damaged the plant. Confirm fresh chewing and nighttime activity before choosing a response.
Are earwigs chewing your cannabis? Learn their nighttime damage pattern, how to distinguish other pests, and what to inspect before treating.
Common Causes
- Moist mulch, trays, pots, or floor debris are providing cool daytime hiding places
- Outdoor plants or equipment brought earwigs into the grow space
- Tender seedlings or damaged plant tissue are offering easy nighttime feeding sites
- Gaps around doors, vents, or greenhouse edges are allowing repeated entry
How to Tell Which One You Have
Look after lights-out with a flashlight and inspect beneath pots, saucers, mulch, boards, and folded leaves. Earwigs have an elongated body and a distinct pair of pincers at the rear. Their feeding leaves irregular holes or ragged edges; it does not produce the fine stippling of mites, silvery scraping and black specks typical of thrips, or the smooth missing sections made by some caterpillars.
FAQ
Do earwigs always harm cannabis plants?
No. They are opportunistic feeders and sometimes prey on other small insects. Action is easier to justify when repeated night checks connect earwigs with fresh damage, especially on seedlings or flowers.
How can I confirm earwigs are making the holes?
Mark existing damage, inspect after dark, and check whether new ragged chewing appears near places where earwigs are hiding. A rolled piece of damp cardboard can also serve as a monitoring shelter that is easy to inspect in the morning.
What should I change if earwigs are confirmed?
Remove damp debris and unnecessary hiding places, correct standing water, seal entry gaps, and use simple monitoring traps. Keep any pesticide or bait away from consumable plant tissue unless its label specifically permits that crop and use.