Cucurbita pepo 'Romanesco'

RHS Plant Profile

courgette 'Romanesco'

Annual Biennial

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A popular Italian variety producing small to medium sized, lightly ridged courgettes that carry a slightly nutty flavour. It is a heavy cropper and will produce fruits through the Summer and early Autumn, if regularly picked

Position

Full sun

Soil Types

Sand, Loam

Max Height

0.1-0.5 metres

Max Spread

0.5-1 metres

Size

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

Growing Conditions

Sand Loam

Moisture: Moist but well–drained or Well–drained
pH: Acid or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H2

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Cucurbitaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy, Clump forming
Genus: A small genus of climbing or trailing, annual herbaceous fruits. Several edible species are cultivated for food and other uses. Native to Central and South America. Solitary, star-shaped flowers are usually golden-yellow. Leaves are palmately lobed, covered with tiny, prickly hairs
Name Status: Accepted

How to Grow

Cultivation

Grow in rich, fertile, well drained soil in full sun. Start indoors from February to May, sowing in individual pots with seeds on their side about 1.5cm deep. Harden off before transplanting outdoors to final growing position. Or sow direct March to July when the air temperature is above 18C. See cucurbit cultivation for further advice

Propagation

Propagate by seed. See sowing vegetable seeds for further advice

Suggested planting locations and garden types

Patio and container plants
Wildlife gardens

Pruning

No pruning required. Regular harvesting extends cropping

Pests

May be susceptible to slugs and snails

Diseases

May be susceptible to grey moulds and Powdery mildews