Brassica oleracea Redbor
Brassica oleracea Redbor
Brassica oleracea var. sabellica Redbor
Curly kale 'Redbor', Borecole 'Redbor'
Brilliant! The kale shoots have really grown well and still look magnificent 15 days before Christmas. Highly recommended!
Nathalie, 16/12/2023
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This plant carries a 6 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
Description
'Redbor' F1 Kale is a variety that is both highly decorative and rich in nutrients. With its upright habit and highly fringed foliage, its silhouette resembles that of a small palm tree. Crimson red, its colour intensifies with the arrival of cold weather until it becomes wine-coloured. It easily reaches a height of 80cm (32in) or more. The leaves of this kale can be consumed raw and add a beautiful colourful note to salads. For cooked consumption, steam them so that they retain some of their colour and all their crunchiness. 'Redbor' kale plug plants are planted in spring or summer in rich and moist soil in full sun or partial shade. It can be harvested all year round. This variety can be grown in pots on a balcony or patio.
A favourite among Americans, kale is an ancient variety of green cabbage with exceptional nutritional values: it contains more vitamin C than an orange and more calcium than a glass of milk! Low in calories, rich in minerals, and detoxifying, this cabbage, still relatively unknown in Europe, is gaining a prominent place in our kitchens.
Sometimes known as borecole, rabbit cabbage or cow cabbage, this nutritional phenomenon has slightly tough fringed foliage that varies in colour from green to dark red. It is a cabbage that does not form a head. It belongs to the large Brassicaceae family (formerly Cruciferae) and bears the Latin name Brassica oleracea.
Very common on medieval tables and then relegated to the rank of fodder, kale has experienced a spectacular craze in the United States. It can be consumed raw in salads or quickly steamed and then prepared in various ways: quickly sautéed, gratin, in quiche, or mashed. This "Super Healthy Food" can also be incorporated into all kinds of preparations like fruit smoothies. If you lack inspiration, there are several recipe books dedicated solely to this particular cabbage.
Kale is very easy to grow as it requires little space and has excellent hardiness (at least down to -10°C (14 °F)). It also seems to better resist potential pest attacks. Note, however, that like almost all cabbages, it requires excellent organic fertiliser and regular moisture.
Harvest: pick the leaves around the plant, which will continue to grow and produce new leaves. Kale can be harvested from the young leaf stage until it reaches maturity.
Storage: this cabbage can be stored for a few days in the refrigerator, but since it would be a shame to miss out on its vitamins, we recommend consuming it quickly after harvesting. It freezes very well after being blanched for 3 minutes in salted boiling water.
Gardener's tip: to keep it moist in summer and protect it from the cold in winter, we recommend mulching the soil with thin successive layers of clippings, if possible mixed with dead leaves. This protection also limits weed growth.
Note: please be aware that our young plug plants are professional products reserved for experienced gardeners. Upon receipt, transplant and store them under cover (veranda, greenhouse, cold frame) at a temperature above 14°C (57.2°F) for a few weeks before being installed outdoors once all risk of frost has passed.
Harvest
Plant habit
Foliage
Planting and care
Kale is grown in full sun or partial shade. It is a greedy vegetable that requires well-rotted soil, rich in nitrogen and potash. It is advisable to make a generous compost addition (about 3/4 kg per m²) in autumn, by raking to a depth of 5cm (2in), after loosening the soil as you would for any vegetable cultivation.
Planting takes place in spring, in April-May. Dig a hole (3 times the volume of the root ball), place the root ball and cover with soil. Firmly press down and water to keep the soil moist. Regularly water at the base of the plant, but not in excess. Place mulch around the base of the plants.
It is not very tolerant of soil pH, which should be between 5.6 and 6.5. In acidic soil, gradually increase the pH by adding calcium in the form of dolomite or lime. It is beneficial to associate it with other crops, such as tomatoes or lettuce. Avoid planting it next to other Brassicaceae as well as courgette, fennel, lamb's lettuce, leeks, and strawberries.
Cultivation
Care
Intended location
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.