Fennel seed
Fennel seed suppliers and sourcing guide
Fennel seed is the dried, ripe fruit of Foeniculum vulgare, a perennial in the parsley family grown mainly in India, Egypt, China and the Mediterranean. Sweet fennel (var. dulce) is the main culinary type; bitter fennel has more fenchone. Seeds are harvested, dried and cleaned, then sold whole, cracked or ground. Brands buy it for sausage and meat seasonings, baked goods, teas and spice blends, and fennel oil, rich in anethole, for flavors.
- Also known as
- Foeniculum vulgare · Sweet fennel · Saunf
- Facts checked
- November 2026
Forms and grades of fennel seed
Suppliers sell different products under the same name. Specify the one you need.
Whole seed
Cleaned seed graded by color (greener is preferred), size and purity.
Cracked and ground
Cracked seed for sausage and ground seed for blends.
Sweet and bitter types
Sweet fennel for food use and bitter fennel, sold separately, mainly for herbal products.
Fennel oil
Steam-distilled oil high in trans-anethole for flavors.
Steam-treated and organic
Steam-treated lots for ready-to-eat use, and certified organic fennel.
What to check on the COA
Compare each result with your own specification when the lot arrives.
- Volatile oil
- Volatile oil by steam distillation, the main strength figure.
- Anethole and estragole (oil)
- Trans-anethole and estragole by GC for fennel oil and extracts.
- Moisture
- Moisture by distillation or loss on drying.
- Total and acid-insoluble ash
- Ash by gravimetry; acid-insoluble ash measures sand and soil and is the usual cleanliness check for ground fennel.
- Purity and foreign matter
- Foreign seeds, stems and extraneous matter by sorting.
- Microbiology
- Total plate count, yeast and mold, coliforms or E. coli, and Salmonella; raw spices commonly carry high counts, so state whether the lot was steam-treated or otherwise treated.
Storage, lots and expiry
Storage and shelf life
Store fennel seed in sealed, lined bags or containers in a cool, dry, dark area off the floor; heat, light and air drive off volatile oil, and damp storage invites mold and insects. Shelf life is set by the supplier specification, and volatile oil and micro are the usual retests for older stock.
Lots and expiry dates
Color, oil content and type (sweet or bitter) vary by origin and crop, so record type, origin and volatile oil for each lot. Keep sweet and bitter fennel on separate item codes.
Regulatory status
Facts from regulators and standards bodies, each linked to its source.
21 CFR 182.10 lists common fennel (Foeniculum vulgare) and sweet fennel among spices and other natural seasonings and flavorings that are generally recognized as safe (GRAS) for their intended use.
Source: ecfr.gov (opens in a new tab)FDA's Compliance Policy Guide 525.750 describes fennel seed as the clean, dried, ripe fruit of Foeniculum vulgare, with quality measured by volatile oil, ash and moisture.
Source: fda.gov (opens in a new tab)Health Canada's sweet fennel natural health product monograph lists the dried fruit of Foeniculum vulgare var. dulce as the source material and notes that "seed" is commonly used for the dried fruit.
Source: webprod.hc-sc.gc.ca (opens in a new tab)
This is general information, not regulatory advice. Status differs by country and by how the ingredient is used, so check the rules for your product and market.
Fennel seed suppliers
Manufacturers and distributors whose own websites say they sell it.
We are checking fennel seed suppliers now
Every listing is checked against the supplier’s own website before it goes live, so this list fills in over the coming weeks. The specs and COA checklist above are ready today.
Sell fennel seed? Request a listingFrequently asked questions
What forms of fennel seed can brands buy?
Common forms include whole seed, cracked and ground, sweet and bitter types, fennel oil and steam-treated and organic. Ask each supplier for the specification sheet of the exact grade they quote.
What should the COA for fennel seed include?
Expect volatile oil, anethole and estragole (oil), moisture, total and acid-insoluble ash, purity and foreign matter and microbiology, each with its method, specification and result for that lot.
How should fennel seed be stored?
Store fennel seed in sealed, lined bags or containers in a cool, dry, dark area off the floor; heat, light and air drive off volatile oil, and damp storage invites mold and insects. Shelf life is set by the supplier specification, and volatile oil and micro are the usual retests for older stock.
What is the regulatory status of fennel seed?
21 CFR 182.10 lists common fennel (Foeniculum vulgare) and sweet fennel among spices and other natural seasonings and flavorings that are generally recognized as safe (GRAS) for their intended use. FDA's Compliance Policy Guide 525.750 describes fennel seed as the clean, dried, ripe fruit of Foeniculum vulgare, with quality measured by volatile oil, ash and moisture. Health Canada's sweet fennel natural health product monograph lists the dried fruit of Foeniculum vulgare var. dulce as the source material and notes that "seed" is commonly used for the dried fruit.
More flavors, spices and essential oils
- Vanilla extractExtract of vanilla · Pure vanilla extract
- Vanilla beansVanilla planifolia · Vanilla tahitensis
- Vanillin4-Hydroxy-3-methoxybenzaldehyde · Vanillic aldehyde
- Ethyl vanillin3-Ethoxy-4-hydroxybenzaldehyde · Bourbonal
- Natural flavorsNatural flavoring · Natural flavour
- Artificial flavorsArtificial flavoring · Synthetic flavors
- CinnamonCinnamomum verum (Ceylon cinnamon) · Cinnamomum cassia (Chinese cassia)
- NutmegMyristica fragrans · Nutmeg seed
- CloveSyzygium aromaticum · Eugenia caryophyllata
- CardamomElettaria cardamomum · Green cardamom
- Black pepperPiper nigrum · Peppercorns
- Cayenne pepperCapsicum annuum · Capsicum frutescens
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