Fennel (Foeniculum vulgare) Datasheet
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Common Name: Fennel
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Scientific Name: Foeniculum vulgare
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Family: Apiaceae
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Origin: Native to the Mediterranean region
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Zone Hardiness: USDA Zones 4–9 (grown as a perennial in warm zones; annual in colder climates)
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Light Requirements: Full sun; requires 6–8+ hours of direct sunlight daily
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Water Needs: Moderate; prefers evenly moist soil—about 1 inch per week
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Soil Preferences: Well-drained, fertile loam with a pH between 6.0 and 7.0; benefits from compost-rich soil
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"Ponics" Compatibility:
- Aquaponics: Fairly compatible
- Aeroponics: Fairly compatible with root support
- Hydroponics: Fairly compatible
- Preferred Method: Deep Water Culture (DWC) or media beds with good airflow and root anchoring -
Growth Habit: Herbaceous perennial (often grown as an annual); upright growth with feathery foliage and bulbous base (in Florence fennel)
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Height & Spread: Height: 3–5 feet; Spread: 1.5–2 feet
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Time from Germination to Harvest: Bulb: 80–100 days; Leaves: ~60 days; Seeds: 100–120 days
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Flowering Time: Summer (typically July–August); produces umbrella-shaped yellow flowers
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Edible Parts: Bulb, stalks, fronds (leaves), and seeds
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Medicinal Uses: Traditionally used as a digestive aid, to relieve gas and bloating; seeds are carminative and mildly expectorant
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Companion Plants: Dill, mint, and coriander should be avoided due to cross-pollination; best planted alone or with strong companions like lettuce or cucumber
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Pest & Disease Resistance: Generally pest-resistant; can attract swallowtail caterpillars; watch for aphids and root rot in poorly drained soils
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Harvest Time:
- Bulbs: Harvest when swollen, about tennis ball size
- Fronds: Snip as needed
- Seeds: Collect when umbels turn brown and dry
- Store bulbs in the fridge (up to 5 days); seeds can be dried and kept in airtight jars -
Propagation Methods: Grown from seed; direct sow preferred due to taproot sensitivity; germinates in 7–14 days
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Sustainability Features: Attracts beneficial insects and pollinators; deep taproot breaks up soil; drought-tolerant once established
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Culinary Uses: Bulbs are used raw (shaved) or cooked (roasted, braised); fronds are a fresh garnish; seeds flavor sausage, breads, teas, and pickles
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Fun Fact: The ancient Greeks and Romans associated fennel with courage and strength—fennel stalks were used as victory symbols in athletic events
Florence Fennel (Foeniculum vulgare var. azoricum)
Flavor Profile: Sweet, mild anise flavor with a crisp texture.
Culinary Uses: Excellent raw in salads, roasted, or braised.
Notes: Grown for its enlarged bulb; bolt-resistant varieties are preferred for warmer climates.
Planting Tip: Sow in late summer for fall harvest in warm regions.
Days to Maturity: ~90 days
Bronze Fennel (Foeniculum vulgare ‘Purpureum’)
Flavor Profile: Licorice-like with a slightly more herbal and earthy tone.
Culinary Uses: Fronds used as garnish or in salads; seeds for seasoning.
Notes: Ornamental perennial with bronze-purple foliage; does not form a bulb.
Planting Tip: Excellent pollinator plant; grows well in herb borders.
Days to Maturity: ~75–90 days for foliage; seeds after flowering
Zefa Fino
Flavor Profile: Subtly sweet and crisp with mild licorice notes.
Culinary Uses: Raw or cooked; holds texture well during roasting.
Notes: Swiss-bred variety known for uniform, round bulbs and bolt resistance.
Planting Tip: Ideal for early planting; good for spring and fall harvest.
Days to Maturity: ~80–85 days
Perfection
Flavor Profile: Classic fennel flavor—crisp and aromatic.
Culinary Uses: Versatile in roasted dishes and slaws.
Notes: Uniform hybrid variety with compact growth; resistant to bolting.
Planting Tip: Good for succession sowing throughout the season.
Days to Maturity: ~80 days
Victorio
Flavor Profile: Clean, sweet flavor with tender texture.
Culinary Uses: Best for fresh eating or grilling.
Notes: Italian heirloom; forms small, tight bulbs quickly.
Planting Tip: Grows well in cooler climates; prefers rich soil.
Days to Maturity: ~70–75 days
Solaris
Flavor Profile: Mellow, clean anise flavor.
Culinary Uses: Ideal for slicing raw or sautéing.
Notes: High-yield hybrid for warm climates; slow to bolt.
Planting Tip: Thrives in raised beds or well-drained loose soil.
Days to Maturity: ~75–80 days
Fennel Cultivar Comparison Table
| Variety | Type | Bulb Forming | Foliage Color | Days to Maturity | Bolt Resistance | Best Use |
|---|---|---|---|---|---|---|
| Florence | Bulbing | Yes | Green | ~90 | Moderate | Roasting, salads |
| Bronze | Herbaceous | No | Bronze-purple | ~75–90 (fronds) | N/A | Garnish, pollinator plant |
| Zefa Fino | Bulbing | Yes | Green | ~80–85 | High | Roasting, slaws |
| Perfection | Hybrid Bulbing | Yes | Green | ~80 | High | Succession planting |
| Victorio | Heirloom | Yes | Green | ~70–75 | Moderate | Fresh, quick harvest |
| Solaris | Hybrid Bulbing | Yes | Green | ~75–80 | High | Warm climates, sautéing |
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