Fennel Bronze
Foeniculum vulgare 'Bronze'
A stunning ornamental herb that combines feathery bronze-colored foliage with the distinctive anise flavor that makes fennel a culinary treasure. This dramatic variety serves double duty as both an eye-catching garden focal point and a source of flavorful leaves, seeds, and flowers for cooking. Bronze fennel's graceful, thread-like foliage creates beautiful texture in herb gardens while attracting beneficial insects like swallowtail butterflies.
Harvest
90-115d
Days to harvest
Sun
Full sun
Zones
4–9
USDA hardiness
Height
4-6 feet
Planting Timeline
Showing dates for Fennel Bronze in USDA Zone 7
All Zone 7 herb →Zone Map
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Fennel Bronze · Zones 4–9
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 4 | March – April | June – July | — | July – October |
| Zone 5 | March – April | May – June | — | June – October |
| Zone 6 | March – April | May – June | — | June – November |
| Zone 7 | February – March | April – June | — | June – November |
| Zone 8 | February – March | April – May | — | May – December |
| Zone 9 | January – February | March – April | — | April – December |
Complete Growing Guide
Light: Full sun (6 or more hours of direct sunlight a day). Soil: Clay, High Organic Matter, Loam (Silt), Sand. Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Moist, Occasionally Dry. Height: 4 ft. 0 in. - 6 ft. 0 in.. Spread: 1 ft. 6 in. - 3 ft. 3 in.. Spacing: Less than 12 inches. Maintenance: Low. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.
Harvesting
Aromatic seeds follow the flowers in late summer, early fall.
Color: Green, White.
Garden value: Edible, Fragrant
Harvest time: Fall
Bloom time: Summer
Storage & Preservation
Fresh bronze fennel fronds last 5-7 days in the refrigerator when stored in a plastic bag with stems in water, like cut flowers. For short-term storage, keep harvested fronds at room temperature in water for up to 2 days.
Drying preserves both the bronze color and anise flavor beautifully. Hang small bundles in a warm, dry location away from direct sunlight, or use a dehydrator at 95-105°F. Dried leaves crumble easily and store for up to one year in airtight containers.
Freeze whole fronds in ice cube trays with water or oil for convenient cooking portions. Seeds should be thoroughly dried before storage in airtight containers—properly dried fennel seeds remain viable and flavorful for 3-4 years. Toast seeds lightly before grinding to intensify their sweet anise flavor for baking and tea blending.
History & Origin
Origin: Southern Europe and the Mediterranean
Advantages
- +Disease resistance: Deer, Diseases, Drought, Heat, Humidity, Insect Pests, Poor Soil
- +Attracts: Wildlife Food Source
- +Wildlife value: Attracts bees and other beneficial insects, feeds caterpillars that morph into swallowtail butterflies.
- +Low maintenance
Companion Plants
Plant Together
Dill
Both are umbellifer family members that attract beneficial insects like lacewings and parasitic wasps
Coriander
Another umbelliferous herb that shares similar growing conditions and attracts predatory insects
Nasturtium
Acts as a trap crop for aphids and adds beneficial ground cover
Marigold
Repels nematodes and various garden pests while attracting beneficial pollinators
Chives
Helps repel aphids and other soft-bodied insects that may attack fennel
Lettuce
Benefits from fennel's pest-repelling properties and doesn't compete for nutrients
Cucumber
Fennel may help deter cucumber beetles and other cucumber pests
Cabbage
Fennel helps repel cabbage moths and other brassica pests
Keep Apart
Tomato
Fennel may inhibit tomato growth and can negatively affect fruit development
Bean
Fennel's allelopathic compounds can stunt bean growth and reduce nitrogen fixation
Kohlrabi
Despite helping other brassicas, fennel can inhibit kohlrabi's bulb development
Caraway
Both herbs can cross-pollinate and may compete aggressively for similar resources
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #172232)
Pests & Disease Resistance
Resistance
Generally disease resistant, very hardy
Common Pests
Aphids, swallowtail butterfly caterpillars (which are beneficial for butterfly gardens)
Diseases
Crown rot in poorly drained soils, otherwise very disease resistant