How to Kill Mushrooms in Terrariums


A terrarium is a miniature ecosystem contained in a small environment, such as a glass fish tank. Mushrooms may sprout up in a terrarium on occasion. Unfortunately, the only way to kill mushrooms in a terrarium without killing any other plants is to replace the soil, because the fungus that is causing the mushrooms inhabits the soil. One can, however, attempt to dry out the terrarium first.

Step 1

Open the lid of the terrarium and remove the mushrooms.

Step 2

Allow the entire terrarium to dry out for a few days, or until the plants begin to wilt. By removing excess humidity, you may be able to kill the fungus in the soil without killing the other plants.

Step 3

If the mushrooms do not stop growing, uproot the plants from the terrarium and place them aside, keeping their roots out of direct sunlight if possible.

Step 4

Empty the mushrooms and all of the dirt from the terrarium into a garbage bag and discard.

Step 5

Fill the terrarium halfway with a solution of one part bleach and four parts water, and use the sponge to scrub the terrarium clean. Use the same sponge to clean any light fixtures, rocks or the lid of the terrarium.

Step 6

Rinse all terrarium components until no smell of bleach remains.

Step 7

Replace the soil and decorations in the terrarium.

Step 8

Rinse the plants carefully, ensuring there is none of the old contaminated dirt left on them, then replant them in the terrarium.

Tips and Warnings

  • Never eat mushrooms found anywhere other than the grocery store, as some varieties can be deadly.

Things You'll Need

  • Bleach
  • Water
  • Sponge
  • Garbage bag
  • Potting soil


  • Storm the Castle: The Basics of Terrarium Building
  • The Garden Helper: Mold In Terrarium

Who Can Help

  • Glass Tropics: Fungi
Keywords: terrarium mushroom problems, killing terrarium mushrooms, terrarium fungus removal

About this Author

Nicole Papagiorgio has been writing professionally since 2005. She is a blogger and freelance writer based in Canada and has been published in the "National Post," "Ottawa Citizen" and "Vancouver Sun." Papagiorgio has an associate degree in journalism from Algonquin College in Ontario.

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