Recipes for Potting Medium for Orchids

A potting medium for orchids need not be complicated. Mixes are always a combination of about 70-85% Organic material, with the balance being Inorganic substances. The materials you choose will be dependant on the species of your orchid.

Is it a Large Species or a Miniature?

Does it like Less Moisture, or More?

Here are a number of recipes for you to experiment with. Don’t feel like you have to get it exactly right the first time. Your Orchid will tell you if you have made a mistake. Pay attention to the response of your orchid, and adjust as needed.

Mix for Large Species of Orchids that like dry roots:

  • 80% Course Grade Fir Bark, Redwood Bark, or Tree Fern Fiber
  • 20% Course Grade Charcoal, Lava, or crushed brick.


Mix for Large Species that prefer more moisture:
  • 80% Sphagnum, or Coconut Husks
  • 15% Course Lava, Charcoal or Crushed Brick
  • 5% Vermiculite


Mix for Medium Sized Species that like dry roots:
  • 80% Medium Grade Fir Bark, Redwood Bark, or Tree Fern Fiber
  • 20% Medium Grade Charcoal, Lava, or crushed brick


Mix for Medium Sized Species that prefer more moisture:
  • 80% Sphagnum, or Coconut Husks
  • 15% Medium Grade Lava, Charcoal or Crushed Brick
  • 5% Vermiculite


Mix for Miniatures that prefer Dry roots:
  • 80% Fine Grade Fir Bark, Redwood Bark, or Tree Fern Fiber
  • 20% Fine Grade Charcoal, Lava, or crushed brick


Mix for Miniatures that prefer more moisture:
  • 80% Sphagnum, or Coconut Husks
  • 15% Fine Grade Lava, Charcoal or Crushed Brick
  • 5% Vermiculite


For more general information about potting medium for orchids, and seedling mixes check out the links below.



More about Potting Medium for Orchids
Repotting Orchids

Grow Your Own Orchid Seedlings



Dream Orchids Home Page