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Romanesco Broccoli Early - Vilmorin Seeds

Brassica oleracea botrytis Romanesco
Romanesco Broccoli

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Romanesco broccoli is a remarkable Italian vegetable, similar to cauliflower in taste and texture. It forms beautiful whorled, apple green heads that are very ornamental and have a subtle, delicate nutty flavour. This early-maturing Vilmorin selection is sown from June to August and harvested from December to February.
Ease of cultivation
Beginner
Height at maturity
50 cm
Spread at maturity
50 cm
Soil moisture
Damp soil
Germination time (days)
14 days
Sowing method
Direct sowing
Sowing period June to August
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A
M
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Harvest time January to February, December
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Description

Romanesco broccoli is a remarkable Italian vegetable, similar to cauliflower in taste and texture. It forms beautiful whorled, apple green heads that are very ornamental and have a subtle, delicate nutty flavour. This early-maturing Vilmorin selection is sown from June to August and harvested from December to February.

Romanesco broccoli, also known as Roman cauliflower, belongs to the large Brassicaceae family (ex-Cole family). This biennial plant is grown as an annual for its edible flower heads that are harvested just before they start to bloom. It is native to Italy where it has been grown since the 16th century. Romanesco Broccoli has a delicate, nutty taste. It is delicious lightly steamed and added to gratins, quiches, purées or stews. It also goes very well with curry. From a nutritional point of view, it is very healthy: it is low in calories but very rich in vitamins, fibre and minerals.

Romanesco Broccoli is an easy vegetable to grow as long as you meet its basic requirements: deep, rich soil, and regular watering. It enjoys plenty of sun and generally does well in cool and rainy climates.

Harvesting: To harvest Romanesco Broccoli, simply cut off the central flower head with a sharp knife when it feels suitably compact and heavy.

Storage: Fresh Romanesco broccoli does not keep very well. It is best to eat it quickly after harvesting, although it will keep for a few days in the refrigerator. It is also possible to freeze the florets, after having blanched them in boiling salty water for a few minutes.

Good to know: For the past few years, swede midges (Contarinia nasturtii) have been causing considerable damage to brassica plants. We recommend protecting your crops with insect netting from mid-May to mid-July.

Even if the vegetable garden is first and foremost a place for growing great quality veg, it’s always a good idea to leave a bit of room for flowers. Growing flowers alongside your vegetable plants will make your general gardening experience more enjoyable and is a great way to attract pollinators and repel garden pests! Flowers such as gaillardia, marigolds, zinnias, cosmos or nasturtiums can be sown in and around the rows of vegetables. Herbs such as dill can be very useful also. Bear in mind that some companion plants self-seed easily and can be a bit invasive (borage, chives, lemon balm etc.)

Harvest

Harvest time January to February, December
Type of vegetable Flower vegetable
Size of vegetable Medium
Interest Flavour, Colour

Plant habit

Height at maturity 50 cm
Spread at maturity 50 cm
Growth rate slow

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Brassica

Species

oleracea

Cultivar

botrytis Romanesco

Family

Brassicaceae

Other common names

Romanesco Broccoli

Origin

Cultivar or hybrid

Annual / Perennial

Annual

Product reference26101

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Planting and care

Sowing:

The germination temperature of Romanesco Broccoli is around 15°C (minimum 7°C - maximum 20°C) and takes about 14 days.

Sowing period: from June to August

Harvest period: from December to February

You can sow the seeds directly in the ground or prepare seedlings that will be later planted in their final position in the garden.

Seedling preparation: Under cover or in a nursery in the garden for the rest of the year (according to the recommended sowing period), sow the seeds at a depth of 1 to 2 cm in a good seed compost or fine soil. Lightly cover with compost and remember to keep the substrate moist but not waterlogged.

When the young plants appear strong enough to handle, transplant them into pots if necessary before planting them in the garden, when there is no longer any risk of frost. When planting, respect the recommended spacing for direct sowing.

Direct sowing: In properly amended and finely worked soil, make furrows about 1 or 2 centimeters deep, spaced 60 centimeters apart. Sow the seeds and cover them with a thin layer of fine soil. When the seedlings are well developed, thin them out, keeping one plant every 60 centimeters.

 

Cultivation:

Romanesco Broccoli is grown in full sun. It is a demanding vegetable that requires well-rotted, nitrogen-rich and potassium-rich soil. It is advisable to make a generous compost application (about 3/4 kg per m2) in autumn, by raking it into the soil to a depth of 5 cm, after having loosened the soil as is done for any vegetable cultivation. It is not very tolerant of soil pH, which should be between 5.6 and 6.5. In acidic soil, it will be necessary to gradually raise the pH by adding calcium in the form of Dolomite or Lime.

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Seedlings

Sowing period June to August
Sowing method Direct sowing
Germination time (days) 14 days

Care

Soil moisture Wet
Disease resistance Average
Pruning No pruning necessary

Intended location

Type of use Vegetable garden
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Beginner
Exposure Sun
Soil pH Neutral
Soil type Silty-loamy (rich and light), 192

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