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What is Fennel?

Mary Elizabeth
Updated May 16, 2024
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Fennel, also called common fennel or bronze fennel, is a plant (Foeniculum vulgare) that yields both a seed-like fruit and the leafy growth used as an herb. The variety Foeniculum vulgare var. azoricum, known as Florence fennel, finocchio, or sweet anise, has a bulb with celery-like stalks, which are eaten as a vegetable. The vegetable is often confused with the vegetable part of the anise plant, and its "seed" may be confused with aniseed. This plant is in the same family, Apiaceae, as anise, dill, cilantro, caraway, and cumin, and the flavor is similar to anise.


The Roman historian Pliny recommended this plant as an aid for eyesight. It was on Charlemagne's list of herbs, and Florence fennel was Thomas Jefferson's favorite vegetable.


Like a number of the other herbs in its family, common fennel is a tall plant, often reaching a height of 5 ft. (1.5 m), and topped with the characteristic feathery leaves. Florence fennel, while sharing the feathery leaves, attains a height of about 2 ft. (60 cm). The flowers are yellow.


Common fennel is a sun-loving perennial, while Florence fennel is an annual grown from seed which prefers cooler weather. Since these plants can damage other plants grown with them, it should be planted in its own bed.

Food and Other Uses

The herb is a key flavoring in Italian sausage, baked goods including zuccherini or Italian wedding cookies, soup, and fish dishes. Sometimes found in mirepoix and herbes de Provence, fennel may also be used in curry and Chinese five spice powder. The vegetable can be prepared with pork, veal, or fish; appear raw in salads; or be used in stuffing and sauces. Fennel liqueur is called Finocchietto.


Fennel leaves and fruit can both be dried, and the leaves can also be frozen. To harvest the fruit, the dead flower heads should be gathered and stored in closed paper bags in a cool dry place until they are needed. The vegetable is best used fresh.

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Mary Elizabeth
By Mary Elizabeth
Passionate about reading, writing, and research, Mary Elizabeth is dedicated to correcting misinformation on the Internet. In addition to writing articles on art, literature, and music for DelightedCooking, Mary works as a teacher, composer, and author who has written books, study guides, and teaching materials. Mary has also created music composition content for Sibelius Software. She earned her B.A. from University of Chicago's writing program and an M.A. from the University of Vermont.
Discussion Comments
By bagley79 — On Apr 14, 2012

@SarahSon - I had never thought about using fennel essential oil. I have used it in cooking for a long time, but have never used it for any therapeutic purposes.

I think fennel really brings out the taste and flavor of many foods. It does have a distinct taste, so a little bit can go a long ways. Using it in soup is probably the way I use it most often.

Adding fennel to tomato soup, along with some onion and garlic really adds a special flavor. Some people like to eat it fresh, but I don't care so much for it this way.

I have seen it cut up on a relish tray, and it has a crunch like celery, but tastes more like licorice. If I ate it more often, I might acquire a taste for it, but I love using it when I am cooking.

By SarahSon — On Apr 14, 2012

Like most herbs, there are many different uses for fennel. I like to use therapeutic essential oils for some home remedies, and use fennel for a couple different things.

It isn't my favorite smelling oil, but it works well for what I am using it for. To me it has an earthy smell that smells like licorice or anise.

I apply this oil around my eyes to help with puffy eyes. If I have not had a good night of sleep, I have those puffy eyes in the morning, and this helps reduce the puffiness.

This is also a good oil to use for PMS symptoms. I apply a few drops on my abdomen, and it helps with cramping and keeping my hormones in balance.

By lighth0se33 — On Apr 13, 2012

@seag47 – Unfortunately, fennel doesn't do well in clay or in shade. It sounds like you may be stuck buying it from the grocery store.

I have grown fennel before, and it needs full sun in order to develop to its full potential. Also, it doesn't like for the ground to be very moist. It's important not to water it too much.

I live in an area with mild summers, so I can grow fennel easily. I just have to grow it separate from my caraway, because that is one of the plants that will not do well next to fennel.

By seag47 — On Apr 12, 2012

I would like to try to grow some fennel in my garden, but I don't know much about the conditions that this plant would need to grow. My yard is pretty shady, so many types of plants don't do well here.

Also, the soil here has a lot of clay in it. Is that bad for growing fennel, or would it do okay in this type of dirt?

I ate some fennel stalks in a salad at my friend's house, and I really liked the flavor. They remind me of celery, but they also have a slight cabbage flavor to them, along with something else I can't quite pinpoint. I would eat them all the time if I could grow them myself.

By wavy58 — On Apr 12, 2012

@cloudel – I think that fennel works so well at treating your IBS because it has the ability to lessen the severity of cramps. This is why I take it during my menstrual cycle.

I don't like the taste of licorice, so I avoid the tea. Instead, I take a fennel supplement. I only take it for one week once a month, because that is really the only time I need it.

I used to have such severe menstrual cramps that I would have to miss work and stay in bed. The fennel supplement has helped lessen the pain so much that I can go about my regular routine during that week. I still feel cranky and a little bad, but the debilitating cramps are gone.

By cloudel — On Apr 11, 2012

I have a lot of problems with gas and stomach pains, and fennel tea is good at treating this. My doctor diagnosed me with irritable bowel syndrome a few years ago, but the medications I was taking for that didn't eliminate my symptoms. I went to a health food store in search of a natural remedy.

The lady who worked there told me that fennel tea is known for relieving painful gas and indigestion. She also told me that it was caffeine free, which was good news to me. I try to avoid caffeine, because it makes me very jittery.

The fennel tea tastes a lot like licorice candy, and it also reminds me of root beer without the carbonation. It is a shocking taste at first sip, but after awhile, it becomes addictive.

By anon151371 — On Feb 10, 2011

i have a juicing recipe and it calls for 1/2 bulb of fennel. i have never heard of this so was looking to see what it is.

By anon86960 — On May 27, 2010

It could be that the poster was thinking in terms of a homeopathic use.

By anon73727 — On Mar 29, 2010

Creepyola, or not? We think not.

By anon66739 — On Feb 21, 2010

that's a creepy question.

By anon3058 — On Aug 08, 2007

Hello i would like to know if it is safe to use on human and animal skin?

Mary Elizabeth
Mary Elizabeth
Passionate about reading, writing, and research, Mary Elizabeth is dedicated to correcting misinformation on the...
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