Fennel (Bronze)

How to grow Fennel (Bronze)

Foeniculum vulgare 'Purpureum'

🌿 Herb 🔁 Perennial

Feathery bronze foliage with an aniseed flavour, and yellow umbrella flowers loved by hoverflies. A tall, hardy perennial herb.

At a glance: Sow mid April to late May, harvest from mid June.

When to sow, plant and harvest

JanFebMarAprMayJunJulAugSepOctNovDec
Sow outdoors
Harvest

Timed for a typical UK garden (last frost mid-April). The app uses your own town's frost dates.

Growing Fennel (Bronze): what it needs

Light
Full sun · 6+ hours a day
Watering
Keep evenly moist; water pots daily in hot weather
Soil
Fertile, well-drained soil
Spacing
45 cm
Height
1.5 m
In pots
Grows well in containers
Feeding
A liquid feed every two weeks for pot-grown plants
Harvest
About 70 days from sowing
Hardiness
USDA zones 4–9
Difficulty
Easy

Step by step

  1. Mid April – late May · around the last spring frost

    Sow Seeds Outdoors

    Sow thinly in shallow drills where they are to grow. Sow where it will grow; it resents being moved.

  2. 7–14 days after “Sow Seeds Outdoors” · Late April

    Check Germination

    Seedlings should appear in 7–14 days. Keep the compost moist. If sown outdoors, thin to 45 cm apart.

  3. 56–77 days after “Check Germination” · Mid June – early July

    Start Harvesting

    Snip the soft fronds for fish and salads.

Every year

  • March
    Cut Down Old Stems

    Cut last year's dead stems to the ground before new growth starts.

  • August
    Remove Most Flower Heads

    Cut off most flower heads to stop it self-seeding everywhere; leave a few for the seed.

  • September
    Collect Seeds

    Snip ripe brown seed heads into a paper bag and dry them for cooking.

More herbs to grow

Photo: Photo by David J. Stang / Wikimedia Commons (CC BY-SA 4.0)