The main use of the seed of celery is for a diuretic. It is helpful with gout and arthritis. It is just slightly bitter, so it can also be used as a digestive stimulant. Seeds are harvested the second year after flowering.
The root is an effective diuretic, and taken for urinary stones and gravel. Also it is a bitter digestive, liver stimulant. Rarely used today.
In a lesser degree the stalk shares the medicinal properties of the other parts. The stalk is a stimulant for milk flow in the breasts after childbirth. Wild celery is best for this purpose, but the common grocery store variety can be used as well.
HOW TO PREPARE
Essential oil: Must be used in a carrier oil, then massaged topically for arthritis and gout
Root: Chopped and tinctured. It is used as a diuretic for hypertension and urinary problems, as a part of an arthritis remedy, or to use for kidney stimulant and cleanser.
The whole plant: Juice is used for joint and urinary tract inflammation, and nervous exhaustion.
CAUTIONS: The essence oil, and seeds should be avoided during pregnancy because these are a uterine stimulant. Seeds should be cultivated directly from the plant, not the commercial variety (as they are treated with a fungicide). Do not apply the essential oil before going out into the light as these create a great photosensitivity.
The stalks can be sliced or diced into soups, with meats such as tuna, into salads, or eaten raw by itself.