Cardoon Spineless Full White - Cynara cardunculus
Cardoon Spineless Full White - Cynara cardunculus
Cardoon Spineless Full White - Cynara cardunculus
Cardoon Spineless Full White - Cynara cardunculus
Cardoon Spineless Full White - Cynara cardunculus
Cardoon Spineless Full White - Cynara cardunculus
Cynara cardunculus plein blanc inerme
Globe Artichoke, Cardoon
95% germination rate, excellent
Robin, 26/08/2025
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Description
The Full White Cardoon is a panacea: its ribs are wide and fleshy, and the leaves naturally whiten during the season without any specific manipulation. The foliage, finer and more cut than for hardy varieties, remains tomentose on the underside. The absence of spines on this recent variety is particularly noteworthy. The Full White Cardoon retains the properties of the original cardoons. It is rich in fibres, minerals and carbohydrates (including inulin), as well as the laxative and liver detoxifying virtues attributed to it.
Cardoons and artichokes belong to the same family, and the two plants are formally very similar: the same finely cut foliage with a characteristic silver-grey colour, the same type of flowering producing large chard-like heads (another cousin of the family) in indigo to violet. While the artichoke is cultivated for its flower bud, the cardoon is cultivated for the central vein of its foliage. The cardoon flower is edible but noticeably tougher than the artichoke. Pre-blanched, the cardoon rib or stalk can be prepared in gratins, purees, juices, with marrow or as an accompaniment to meats.
The cardoon thrives in humus-rich, moist and well-drained soil. It should ideally be positioned in a sunny spot. At maturity, it can reach a height of 2m (7ft) and a width of 1.50m (5ft) if the stalks have not been gathered for blanching.
Cultivation: a few weeks before harvesting for old varieties, the stalks must be allowed to whiten. To do this, gather the leaves and wrap them in cardboard or opaque film. Be sure to allow air to circulate. Mound the plants with 25 to 30cm (10 to 12in) of soil to stabilise them. With this manoeuvre, the leaves no longer receive light. Photosynthesis no longer occurs, and the leaves become tender and white. A few weeks later, they are ready to be harvested. Note that this operation is not necessary for varieties that naturally whiten.
Harvest: wear gloves, especially for spiny varieties. Pull out the whole root ball and place the leaves in a ventilated place, protected from light. When stored correctly, the stalks can be kept and consumed throughout the winter.
Gardener's tip: promote crop rotation, especially by planning to grow cardoons after a legume crop. This will enrich the soil with nitrogen. Replant the cardoon in the same place after a rotation of at least four years. Indeed, the cardoon is greedy for nutrients.
Cardoon Spineless Full White - Cynara cardunculus in pictures
Harvest
Plant habit
Foliage
Botanical data
Cynara
cardunculus
plein blanc inerme
Asteraceae
Globe Artichoke, Cardoon
Mediterranean
Biennial
Planting and care
Indoor sowing: Cardoon seeds can be sown in a cold greenhouse in April or May. Use a rich soil, amended with well-decomposed compost. Dig holes a few centimetres deep in which you will place a few cardoon seeds. Thin out by choosing the most vigorous seedlings when they have three leaves. Once they are strong enough to be handled, plant them in open ground, making sure to space them about a metre apart in all directions.
Outdoor sowing: From May to July, when the soil is completely warmed up, start by amending your soil with well-decomposed compost. Loosen the soil and then, at a depth of 3 to 4 cm (1 to 2in), sow 3 to 4 seeds in holes. Water generously immediately. When the seedlings have at least three leaves, thin out by keeping only the plants that seem the most robust. Each plant should be spaced at least a metre apart. Harvesting takes place in September or October, about 5 months after spring sowing.
Seedlings
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.