Outsidepride Peppermint Herb Plant Seeds - 5000 Seeds Peppermint seeds can be grown as a perennial herb plant in USDA zones 3 - 10. These plants will reach a height of 24 inches and then produce a beautiful pink bloom. Use for culinary purposes in your kitchen or simply enjoy these beautiful plants in your herb garden. Peppermint, or mentha piperita, is the perfect complement to any herb garden as no garden is complete without this mint; however, you can plant these herb seeds indoors or outdoors. This heirloom, non gmo herb mint is wonderfully fragrant and provides a cool fresh scent that catches in the summer breezes Sow 3 to 5 seeds per plant. These herb seeds should be covered 1/8th with fine soil and keep seeds continually moist until germination.