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Brassica oleracea costata - DC.

Common Name Couve Tronchuda
Family Brassicaceae or Cruciferae
USDA hardiness 7-10
Known Hazards None known
Habitats Not known in the wild.
Range A cultivated form of B. oleracea.
Edibility Rating    (3 of 5)
Other Uses    (0 of 5)
Weed Potential No
Medicinal Rating    (0 of 5)
Care (info)
Frost Hardy Moist Soil Semi-shade Full sun
Brassica oleracea costata Couve Tronchuda


Brassica oleracea costata Couve Tronchuda

 

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Summary


Physical Characteristics

 icon of manicon of flower
Brassica oleracea costata is a BIENNIAL growing to 1.5 m (5ft).
See above for USDA hardiness. It is hardy to UK zone 8 and is not frost tender. It is in leaf all year, in flower from May to August, and the seeds ripen from July to September. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. The plant is self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in heavy clay soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil. The plant can tolerate maritime exposure.

UK Hardiness Map US Hardiness Map

Synonyms

Habitats

 Cultivated Beds;

Edible Uses

Edible Parts: Leaves
Edible Uses:

Leaves - raw or cooked[2, 27, 33, 200]. Tender[264]. Most commonly eaten as a vegetable, though the younger and more tender leaves can be added to salads. Some people find the raw leaves hard to digest[K]. The leaves can be available all through the winter[264]. The leaf ribs are cooked like seakale (Crambe maritima.)[27, 33].

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.


None known

References   More on Medicinal Uses

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Other Uses

None known

Special Uses

References   More on Other Uses

Cultivation details

Succeeds in full sun in a well-drained fertile preferably alkaline soil[16, 200]. Prefers a heavy soil[16]. Succeeds in any reasonable soil, but is best when grown in a rich soil[33]. Couve tronchuda is a non-hearting form of cabbage with large green leaves and prominent white midribs that are available to eat mainly in the autumn[200]. The plant is transitional between the hearting cabbages and the kales[200]. Occasionally cultivated for its edible leaves and leaf stem, it is taller growing than the cabbages but less hardy, tolerating temperatures down to between -5 and -10°c[200]. One report suggests that it might be resistant to club root[33]. A good bee plant[108].

References   Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

Type a value in the Celsius field to convert the value to Fahrenheit:

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Propagation

Seed - sow in a seedbed outdoors in April. Plant out as space permits in summer. Do not let the seedlings get overcrowded or they will soon become leggy and will not make such good plants. If your seedlings do get leggy, it is possible to plant them rather deeper into the soil - the buried stems will soon form roots and the plant will be better supported.

Other Names

If available other names are mentioned here

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Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

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Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Expert comment

Author

DC.

Botanical References

200

Links / References

For a list of references used on this page please go here

Readers comment

christine stevenson   Sun Jun 24 2007

I am new to growing brassicas and yet have found this grows unbelievably well, despite my very amateur efforts. Neither rabbits nor deer have attacked it - a problem I suspected i'd have - and even the slugs seem to be finding it hard-going! It is very large though, and I certainly planted my plants too close. I shall be growing this next year.

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Subject : Brassica oleracea costata  
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