🌿 Fennel 'Herb Fennel'

Sowing window (UK)	April to June
Minimum soil temperature	7°C at seed depth
Sowing depth	1 cm
Spacing	38 cm apart
Days to germination	14 days
Days to harvest	60 days
Sowing method	Direct sow outdoors
Frost hardy	Yes
Sun	full-sun
Watering	low
Plant family	Apiaceae

When should I sow Fennel 'Herb Fennel' in the UK?

In the UK, sow Fennel 'Herb Fennel' from April to June. It is normally sown direct outdoors. Wait until the soil has reached 7°C at seed depth rather than going by the calendar - fennel will sit and rot in cold ground.

What soil temperature does Fennel 'Herb Fennel' need to germinate?

Fennel 'Herb Fennel' needs a minimum soil temperature of 7°C at seed depth to germinate reliably. Below that, germination is slow and patchy, and seed is more likely to rot than sprout. Measure at around 5cm down, in the morning, rather than trusting air temperature.

How deep and how far apart should I sow Fennel 'Herb Fennel'?

For Fennel 'Herb Fennel', sow it 1cm deep and space plants 38cm apart.

How long does Fennel 'Herb Fennel' take to grow?

Fennel 'Herb Fennel' takes roughly 60 days from sowing to harvest. Seed usually germinates in about 14 days.

Is Fennel 'Herb Fennel' frost hardy?

Yes. Fennel 'Herb Fennel' is frost hardy and will stand through UK frosts, so it can be left out over winter in most of the country.

Sowing data cross-checked against RHS growing guides and UK seed-merchant catalogues. Soil temperatures are the minimum for reliable germination, measured at seed depth.