Various open-pollinated lines derived from Big Zac are favorites among those who like to grow extremely large tomatoes, and have produced at least two world records. Seeds for Big Zac OP are available from some of the sources in Carolyn's Google search and are also listed in the Seed Savers Exchange Yearbook. These lines have been around for a while, so they are are probably derived from the original Totally Tomatoes version of Big Zac F1.
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