Seed Exchange: Grow – Eat – Share Posted on January 1, 2019 at 2:26 pm. The library at both the Whitby and North Oshawa Campuses are offering a free seed exchange. Stop by and check out our collection of container-friendly, heirloom seeds. Choose seeds to plant at home, grow and enjoy. Save some of the harvested seeds to return to the library. For more details, please visit Horticulture: Seed Exchange or contact the Whitby Campus Library at 905.721.2000 ext. 4218. SHARE: