Starter plant of Grapefruit Mint Mentha x piperita Grapefruit. This mint has a flavor that resembles spearmint with a twist of unsweetened grapefruit. Crush leaves into water for a refreshing beverage, or add to iced tea. This plant is attractive to bees, butterflies and/or birds. Grows 18 to 24 inches with blue flowers that are fragrant. Average Water Needs; Water regularly do not over water. In small gardens, corral growth by tucking this tasty beauty into containers. Hardy in zones 6 to 11