Visit Seeds of Change on Facebook (desktop link) and click in the map to vote for a participating community garden to register to receive a free product coupon.
This campaign has been active for a little while and it will be active until December 31, 2015; or while supplies last. The coupon does arrive, I got mine last month. One coupon is available per Facebook account.
Seeds of change donates 1% of the proceeds from each sale in 2015 to a participating community garden.