
How to grow Fennel (Bronze)
Foeniculum vulgare 'Purpureum'
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
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
- 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.
- 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.
- 56–77 days after “Check Germination” · Mid June – early July
Start Harvesting
Snip the soft fronds for fish and salads.
Every year
- MarchCut Down Old Stems
Cut last year's dead stems to the ground before new growth starts.
- AugustRemove Most Flower Heads
Cut off most flower heads to stop it self-seeding everywhere; leave a few for the seed.
- SeptemberCollect 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)





