The TGRC distributes seed samples gratis to bona-fide researchers, breeders, and educators. We do not normally provide material for home gardening or commercial production, but we can suggest alternative seed sources (see links).

The standard sample sizes are 25 seeds for self-pollinated stocks, and 50 seeds for outcrossing wild species accessions. Users should plan to multiply their own seeds, as needed, to produce larger quantities, as we do not normally provide duplicate samples. For some of our stocks, available seed quantities may be very limited, and some accessions may be temporarily unavailable for distribution. For the latter, we will substitute similar stocks that are available for distribution.

Due to increasing demand for our stocks, and the significant time and costs involved in processing requests, we ask that users limit the number of accessions per request to the most essential items, and those which can be immediately utilized. Orders should be limited to no more than 50 samples per request. For the wild species, the core subsets are a convenient means to sample a smaller number of accessions per species. For introgression line populations, researchers are asked to limit initial requests to the primary subsets for each species.

International requests:

1)  Recipients are responsible for obtaining import permits, if they are required for shipment to their home country.  The TGRC cannot ship seed until the import permit is received. If you are not certain whether your country requires an import permit, please contact the TGRC (tgrc@ucdavis.edu).

2)  Phytosanitary Certificates: Seed shipments from the TGRC to researchers in countries outside the U.S. must be accompanied by a phytosanitary certificate.  Due to the increasing cost of obtaining phytosanitary certificates we ask that users in foreign countries reimburse the TGRC for these expenses. The cost of a phytosanitary certificate is currently $24 / per request, regardless of the number of accessions shipped. 

• Only credit card payments are accepted. Instructions will be provided prior to processing of your seed request.
• We cannot obtain phytosanitary certificates for some stocks -- these are indicated as not available for international shipment.

3) Countries we are currently unable to ship seed to: E.U. countries, Iran, Israel, Turkey.

Please allow 2 weeks for processing domestic requests, and up to 4 weeks for international and large orders. You will be notified by email when seeds are shipped.

For questions regarding your request, please contact Jennifer Petersen at tgrc@ucdavis.edu.