Tom Clothier Annual/Biennial Seed Germination Database [Tom Clothier]. 2020. Tom Clothier’s Garden Walk and Talk. https://tomclothier.hort.net/page05.html [Accessed 2020 January 13].

Tom Clothier Annual/Biennial Seed Germination Database [Tom Clothier]. 2020. Tom Clothier’s Garden Walk and Talk. https://tomclothier.hort.net/page05.html [Accessed 2020 January 13].

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