The ‘Indigo Blueberries’ is another tomato in the Indigo varieties. The dark purple color comes from anthocyanin. The more sun the tomato gets… the darker it becomes like a blueberry. No sun means no dark purple color. I found the Indigos can be a little tart. The trick is to make sure they ripen and then give them a few extra days. A sweetness will arrive.
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