NANPS Seed Exchange

The 2017 - 2018 Seedex  list is available for viewing at Native Plant Seed Exchange!

The NANPS Seed Exchange is open to all members across the continent and relies on your participation.  If you are not yet a member, you may join online now or include your membership form with your seed request. 

The NANPS seed exchange started in the Fall of 1988 and has been running continuously ever since. There are over 10,000 species of vascular plants native to temperate North America. Our seed exchange offers you the chance to increase the population of a few of these. Please help North American flora to flourish by growing locally native plants in your own garden and offering some of their seed to our Exchange.

Seeds are most often contributed from NANPS members' gardens but donations of seed ethically collected (less than 10% from a healthy population of relatively common species; otherwise do not collect!) from wild sources is also welcome. Once seed is sent to us we endeavour to store it appropriately (e.g. moist medium for hydrophilic seed, refrigeration at the appropriate time). We are only able to do this after the seed is mailed to us.

If you are donating seeds, please remember to:

  • provide botanical and common name
  • provide source information if known
  • write clearly and legibly

Genetic provenance is an important consideration when selecting seeds from the Seed Exchange and whatever information you are able to provide about the origin of your seed is appreciated.

The purpose of the exchange is to make native plant seed of known provenance available to members at nominal cost.  It is not our intention to generate revenue from the seed exchange, but simply to cover the costs of packaging and mailing. In order to export seed to the United States, we are required to obtain a phytosanitary certificate, which adds an additional cost for our American members. We cannot ship seeds of shrubs, trees, vines and some proscribed grass species to the U.S.

We recommend that members order seed that originates from their bioregion (the general rule of thumb is within a 200-kilometre range, or 125 miles). The same species grown at different locations will be listed separately, so that members can select the seed source closest to where they live.

The list of available seed is mailed to members with the Fall edition of our quarterly newsletter. the Blazing Star. Members are asked to send us their seed requests from the Fall edition by the second week of January for mailing by the end of the month.  Seed requests for the second round, which will be online, are due before March 31st for response by mid April. The seed exchange resumes again in the fall.

Donated native plant seed with provenance noted should be sent to:

NANPS Seed Exchange
P.O. Box 69070, St Clair PO, Toronto, Ontario M4T 3A1

Inquiries about how the seed exchange works, or how to unlock the dormancy mechanism for seed offered, can be made to: This email address is being protected from spambots. You need JavaScript enabled to view it.