53-63 days. Standing alone as the only two-toned Swiss chard, Peppermint's clean white stems sport blazing fuchsia streaks, making it not only one of our most eye-catching varieties, but its coloration also reveals a potent antioxidant content. Topped off with wide, rumpled, lustrous, green leaves, Peppermint provides ample harvests of wholesome fresh greens for both warm and cool weather plantings.