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This is the difference between an heirloom green pepper and an heirloom red sweet
pepper.
What is ripeness? Unless it’s a hybrid sweet pepper, the bell pepper turns green before it turns
red. Hybrid seeds produce white, yellow, orange, red, green, and purple (almost black) bell
peppers. The Old Farmer’s Almanac says, “The longer bell peppers stay on the plant, the more
sweet they become and the greater their Vitamin C content.”