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Cauliflower Winter Aalsmeer

Brassica oleracea botrytis Winter Aalsmeer
Cauliflower

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More information

Graden Merit
Very hardy variety, awarded by the prestigious Royal Horticultural Society, which withstands the cold very well and produces very beautiful cream-white bouquets, well protected by its foliage. Its growth is slow, making it a "long-term" crop. This Cauliflower is sown from May to June for a harvest 40 to 46 weeks later.
Ease of cultivation
Beginner
Height at maturity
60 cm
Spread at maturity
75 cm
Soil moisture
Damp soil
Germination time (days)
14 days
Sowing method
Direct sowing
Sowing period May to June
J
F
M
A
M
J
J
A
S
O
N
D
Flowering time March to April
J
F
M
A
M
J
J
A
S
O
N
D
Harvest time February to May
J
F
M
A
M
J
J
A
S
O
N
D

Description

The 'Winter Aalsmeer' Cauliflower (in Latin, Brassica oleracea botrytis) is a very hardy variety, awarded by the prestigious Royal Horticultural Society, which withstands cold weather very well and produces beautiful creamy white bouquets, well protected by its foliage. Its growth is slow, making it a "long-term" crop. This cauliflower is sown from May to June for a harvest 40 to 46 weeks later.

A beautiful immaculate white and even, in recent years, cheerfully yellow, orange or violet, the Cauliflower is a flower vegetable whose fleshy meristem is consumed. It belongs to the large family of Brassicaceae (formerly Crucifers) and bears the Latin name Brassica oleracea botrytis. Sometimes called Cyprus Cabbage, the Cauliflower is a biennial vegetable plant whose presumed origin is China.

Consumed for the first time in Germany only 300 years ago, this vegetable has found a special place in our kitchens because it lends itself to many preparations. It can be eaten raw in salads or cooked, plain, in a gratin with béchamel sauce, or accompanied by a curry sauce that complements its flavour. It is a low-calorie vegetable and rich in vitamin C.

There are many varieties of Cauliflowers, each with a distinct growing period that should be respected. Thus, by carefully choosing your seeds, you can have this vegetable all year round.

Cauliflower is a demanding vegetable, requiring excellent basal fertilisation and regular moisture.

Harvest: Cauliflower is harvested when its head is compacted by cutting it at ground level.

Storage: Cauliflower does not keep very well. It is best to consume it quickly after harvest. It can be stored for a few days in the refrigerator. You can also freeze it after blanching it for 3 minutes in salted boiling water.


Gardener's tip: The main enemy of the cauliflower is the Cabbage White Butterfly (Pieris brassicae), a pretty cream-white butterfly with small black spots that emerges in April-May to wreak havoc all summer by devouring its leaves. While spraying a solution based on Bacillus Thuringiensis is an acceptable curative measure, we prefer, in our garden, to opt for prevention by installing insect-proof netting tightly on market garden hoops. These nets are easy to install and reusable to protect, for example, your carrot and leek crops.

Harvest

Harvest time February to May
Type of vegetable Flower vegetable
Size of vegetable Medium
Interest Flavour, Productive

Plant habit

Height at maturity 60 cm
Spread at maturity 75 cm
Growth rate slow

Foliage

Foliage persistence Annual
Foliage colour medium green

Botanical data

Genus

Brassica

Species

oleracea

Cultivar

botrytis Winter Aalsmeer

Family

Brassicaceae

Other common names

Cauliflower

Origin

Cultivar or hybrid

Annual / Perennial

Annual

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Planting and care

Sowing:

The germination temperature of 'Winter Aalsmeer' Cauliflower is around 12° and takes about 14 days.

It is sown from May to June for a harvest 40 to 46 weeks later, from February to May in the following year.

You can either sow directly in the ground or prepare seedlings that will be later transplanted to their final position in the garden.

Preparing seedlings: at home or in a heated shelter from late autumn to late spring, or a cold greenhouse or propagator for the rest of the year, sow the cauliflower seeds at a depth of 1 cm (0in) in a tray filled with good seed compost. Lightly cover with compost or vermiculite. Cover with the transparent lid of the tray or plastic wrap until germination. Don't forget to keep the substrate moist but not waterlogged!

When the young plants appear strong enough to be handled, transplant them into pots and, for seedlings in heated shelters, gradually acclimatise them to cooler temperatures before transplanting them to the garden, when there is no longer any risk of frost.

Direct sowing: In properly amended and finely worked soil, make furrows 1 cm (0in) deep, spaced 60 cm (24in) apart. Sow the seeds and cover them with a thin layer of fine soil. When the seedlings are well developed, thin them out, leaving one plant every 80 cm (32in) or so.

 

Cultivation:

Cauliflower is a demanding vegetable that requires well-rotted, nitrogen- and potassium-rich soil. It is advisable to apply a generous amount of mature compost (about 3/4 kg per m2) in autumn, by scratching it to a depth of 5 cm (2in), after thoroughly loosening the soil, as is done for all vegetable crops. 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.

Cauliflower, like all cabbages, is quite susceptible to diseases such as Clubroot and pests (Cabbage White Butterfly, Cabbage Fly, Flea Beetle, Cabbage Midge...). It is very important, for this crop, to pay attention to crop rotations.

It is beneficial to associate it with many vegetables such as tomatoes, lettuce... But avoid planting it next to other Brassicas as well as zucchini, fennel, lamb's lettuce, leeks, and strawberries.

Seedlings

Sowing period May to June
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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