Editor’s note
This publication is a fillable PDF. Select the “Download this publication” button and save the form to your computer. Then either fill it in using Acrobat Reader and print it to send with your samples, or print it and fill it in by hand.


Testing greenhouse media provides an assessment of the material to adequately provide plant nutrients and provide a good rooting environment, i.e. low salt content and adequate pH. After collecting a greenhouse sample, submit directly to the Columbia lab.


  • Soil
  • Plant
  • Gardens
  • Lawns
  • Crops
  • Seed
  • Nutrients


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