Peppermint is a refreshing herb that is easy to grow in a courtyard garden. Its leaves can be used to make tea, which is known for its soothing effects on the digestive system. Peppermint tea can help relieve indigestion, bloating, and nausea. It also has antimicrobial properties and can be used topically to relieve itching and irritation caused by insect bites or rashes.