Anthocyanins are not new to tomatoes. Certain open-pollinated and heirloom varieties naturally develop purple or blue pigmentation, including Cherokee Purple and Indigo Blue Berries.
April 18, 2026
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April 18, 2026 1:05 a.m.
From Heirlooms to GMOs: Why I’m Growing the ‘Purple Tomato’
And that raises the question: Do gardeners need to worry about GMO seeds or plants infiltrating their gardens? Let’s take a closer look at what, if anything, warrants concern.