good indicators

Is Eggplant An Indicator? Plants containing anthocyanins include acai, currant, chokeberry, eggplant, orange, blackberry, raspberry, blueberry, cherry, grapes, and colored corn. Any of these plants may be used as pH indicators. Which plants make good indicators? The Chart. Plants containing anthocyanins include acai, currant, chokeberry, eggplant, orange, blackberry, raspberry, blueberry, cherry, grapes, and colored corn.