Mesocosm

Mesocosms are enclosed environments that allow a small part of a natural environment to be observed under controlled conditions.

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  1. Building a verdant foundation
  • Add a bottom layer of pebbles, gravel or sand – this layer exists for drainage (smaller vessels require thinner rock layers)
  • Add a second thin layer of activated charcoal – this will prevent mold and help to aerate the soil
  • Spread a thin cover of sphagnum moss (or use an organic coffee filter) to create a barrier between the lower layers and soil
  • The final layer is the pre-moistened growing medium (i.e. potting mix)
  1. Selecting the right plants
  • Ideally, choose plants that are both slow growing and thrive in a bit of humidity (e.g. most ferns, club moss, etc.)
  • Inspect the plant thoroughly for any signs of disease or insects before introducing to the terrarium
  1. Maintaining appropriate conditions
  • Ensure the terrarium is placed in a location that provides a continuous source of light
  • Locate the terrarium in a place that does not experience fluctuating temperature conditions (i.e. avoid direct sunlight)
  • Do not initially over-water the plants – once the right humidity is established, a terrarium can go months without watering
  • Occasional pruning may be required – however, as level of soil nutrients decrease, plant growth should slow down
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