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UW Seed Analysis Lab

UW Seed Analysis Lab



Collecting Samples

  1. Bulk bins. Obtain 5 to 7 random sub-samples from several areas of the bin using a seed probe which can reach all areas of the bin. Thoroughly mix the probed seed and divide it down to the amount of seed required by the seed lab.
  2. Bagged seed. Randomly sample 5 bags plus 10% of the total number of bags. Regardless of lot size, it is not necessary to sample more than 30 bags. Once the bags have been probed, mix the seed drawn from the bags, thoroughly mix it, and divide it down to the amount required by the seed lab.


Size of Sample for Testing

Table describes the seed type and the amount of seed needed for a Full Test, Germination or TZ only test.
Seed Size Full Test P/N/G Germination or TZ only
Beans 3 quarts (Canadian) 1 pint
Beans 1 ½ quart 1 pint
Cereals 1 quart 1 pint
Clovers 1 pint 1 cup
Large seeded grasses 1 quart 1 pint
Small seeded grasses 1 pint 1 cup
Penstemon 1 cup 1/4 cup
Saltbush 1 quart 1 cup
Winterfat 2 quarts 1 pint


Submitting Seed Samples

Place seed into a tightly sealed container. Many use zip-lock bags, cloth bags, or heavy-stock envelopes. Include the following with the sample or print the Sample Submission Form (pdf).

  • Name and address
  • Phone number
  • Fax number (if available)
  • Cell number (if available)
  • E-mail address
  • Kind and variety (or VNS)
  • Lot number
  • Any other information you would like on the report, such as a grower name
  • Type of tests requested
  • Treatment – please indicate kind of seed treatment was used if applicable
  • The year the seed was grown or harvested


UW Seed Analysis Laboratory
749 Road 9
Powell, WY 82435
(307) 754-4750

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1000 E. University Ave. Laramie, WY 82071
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