Foeniculum vulgare var. azoricum 'Romanesco'

RHS Plant Profile
fennel (Florence) 'Romanesco'

Other common names

fennel (Florence) 'Romanesco'

Plants for pollinators
Herbaceous Perennial Herbs - Culinary

A hardy, upright, aromatic annual, or short-lived perennial if grown as an ornamental, to around 100cm in height. It has with feathery, bright green foliage which has and a large, swollen stem-base, with the flavour and smell of aniseed. Branching stems of flat-topped, sulphur-yellow flowers appear in summer”

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or East–facing or West–facing
Exposure
Sheltered
Hardiness
H5

Colour & Scent

Fragrance Foliage Stem
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Apiaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Foeniculum is a large biennial or perennial with aromatic, finely dissected leaves and umbels of small yellow flowers, followed by aromatic fruits
Name Status
Accepted

How to Grow

Cultivation

Grow in moist but well-drained soil in fulll sun. May have the potential to become a nuisance if not managed well. See florence-fennel cultivation for further advice

Propagation

Propagate by seed. See sowing vegetable seeds

Suggested planting locations and garden types

  • Wildlife gardens

Pruning

Cut back dead stems in autumn or winter. Remove faded flowers to prevent self-seeding

Pests

May be susceptible to aphids and slugs

Diseases

May be susceptible to root rots and Powdery mildews