One of my favourite herbs is the celery plant (Apium Graveolens).
Celery plant is a flowering biennial plant that pre-dates the commonly available cultivated stringless celery varieties.
It makes my life happier in two ways: firstly, I avoid buying commercially produced vegetable stock, which I hate; and secondly I do not have to buy plastic-wrapped celery from the supermarket! In Griffins Hill garden, our celery is a striking plant growing about one metre high with large incised leaves similar to Italian parsley and thick green stems that are somewhat thinner that those of the supermarket varieties