Lavender is a versatile herb that not only adds beauty to your courtyard garden but also has numerous medicinal properties. Its fragrant purple flowers can be used to make essential oils, which are known for their calming and relaxing effects. Lavender oil can be used to alleviate stress, anxiety, and insomnia. It also has antiseptic and anti-inflammatory properties, making it useful for treating minor cuts, burns, and insect bites.