How to Plant Irish Moss in a Terrarium

Terrariums offer elegant plantscapes and super low-maintenance care. Irish moss makes an attractive terrarium ground cover or a nice selection for mossariums, moss terrariums. Once planted, the Irish moss needs little care. Terrariums that have too much water -- where water stands in the gravel -- should be vented for a couple hours to reduce the liquid level. Those that have too little water -- no condensation occurs -- can be misted with water from a spray bottle.

Things You'll Need

  • Glass terrarium with lid
  • Sponge
  • Dish soap
  • Gravel
  • Activated charcoal
  • Sphagnum moss
  • Potting soil

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Wash a lidded glass terrarium with soap and water to clean it. Dry the container with a dish towel.

Add a 1- to 2-inch gravel layer on the bottom of the terrarium. This increases drainage.

Cover the gravel with a thin layer of activated charcoal, which prevents the terrarium from getting stinky by filtering the air.

Add 1/2 to 1 inch of sphagnum moss on top of the charcoal, which acts as a buffer between the dirt and gravel to maintain a clean-looking terrarium.

Add 1 inch of potting soil on top of the sphagnum moss.

Add water to wet the soil, until the soil is boggy.

Place the Irish moss on top of the soil, pressing the moss into the soil. Moss needs a firm bond with the soil, since it lacks true roots.

Put the lid on your terrarium. Place your Irish moss terrarium in a location where it receives moderate light. While Irish moss grows in shady locations outdoors, terrarium moss needs sunlight or grow lights.


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