Lovage is a tall herbaceous plant that can reach heights of 3 to 7 feet (1 to 2 meters). It has sturdy, hollow stems that are thick and ribbed. The leaves are dark green, glossy, and resemble those of celery. They are large and compound, often measuring up to 2 feet in length, with multiple leaflets.  Lovage produces small yellow flowers in umbels, similar to other plants in the carrot family.
This is a  herb has been around since the Middle Ages and was used by Benedictine monks for its medicinal and culinary properties.  Nowadays it is not much seen in gardens but it should be!  It has an unusual taste, some say a celery like taste but to me it has a more peppery slightly aniseed flavour with a hint of parsley and celery.  Both leaves and young stems are good in soups, stews and the seeds can be used in bread or savoury biscuits and eaten with cheese.  It quite strong so be careful although it does deplete in cooking.  Medicinally a tea can be made with the root and seeds which is good for digestive, stomach and kidney issues.
Lovage is sometimes used as a companion plant in gardens to deter certain pests and attract beneficial insects.