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Sampling Instructions

Sampling Instructions


PetioleTissueSampling-combo-web-2012.jpgSampling Instructions
(Click here for a complete Plant Tissue Sampling Guide)

A good plant tissue analysis relies on a good plant tissue sample. To ensure a representative sample and prevent contamination, follow proper sampling instructions. Always collect an adequate amount of tissue. Review the pictorial sampling guide and crop chart for more info.

Keep in mind that plant tissue samples are dried and subsequently ground, leaving only a fraction of the originally submitted sample available for analysis.

Sampling Reminders

  • Submit clean undamaged leaf tissue in a paper bag.
  • Submit at least a half a lunch bag full of tissue.
  • Label bag and make sure submittal form matches with sample.
  • Be sure to include account number on form.

Sampling Instructions

  1. Do not sample dust or soil contaminated tissues. If all the tissue available is dusty, wash gently in clean, flowing water.
  2. Do not sample diseased, insect or mechanically damaged plant tissue.
  3. Place the plant tissue sample into a brown paper bag. Do not use plastic or polyethylene bags as containers. If the plant tissue is wet or succulent, leave out in the air one day and then mail to the laboratory.
  4. When sampling suspected nutrient element deficient plants, take two samples if possible, one from the normal plants, the other from the abnormal. This comparison testing assured the most valid interpretation of the results.
  5. When sampling, both the TIME and PLANT PART collected are important. Be sure to collect the proper plant part at the recommended time. (See the Crop Chart web page)
  6. If specific sampling instructions are not given for the crop you wish analyzed, a good rule of thumb is to sample mature leaves which are representative of the current season's growth during the mid-period of the growth cycle or just prior to seed set.
  7. Complete the Information Sheet form in its entirety. Missing information will result in an incomplete interpretation and recommendation. Place the completed questionnaire in with the plant sample and mail to the laboratory. Mailing kits are available.
  8. It is recommended that a concurrent soil sample be taken near the roots where the plant sample was taken and sent to one of our laboratories for a complete analysis of nutrients.