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Eryngium zabelii Violetta

Eryngium zabelii Violetta
Sea Holly, Blue Eryngo

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More information

A magnificent perennial thistle, developing sturdy silver stems and dark blue conical inflorescences crowned with long deep blue spiny bracts. A focal point for borders. It flowers in July-August, and its flowers remain decorative for several weeks. Plant in the sun, in well-drained, even dry soil.
Flower size
7 cm
Height at maturity
70 cm
Spread at maturity
50 cm
Exposure
Sun
Hardiness
Hardy down to -20°C
Soil moisture
Dry soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time July to August
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Description

Eryngium x zabelii 'Violetta' is a magnificent variety of sea holly, undoubtedly one of the most beautiful ornamental thistles. It develops sturdy silver stems and dark blue conical inflorescences crowned with long deep blue spiny bracts. It is a plant with well-armored foliage, and provides a focal point for perennial borders. It blooms in July-August, and its flowers, which remain decorative for several weeks, are as ornamental in borders as they are in fresh or dried bouquets. A thistle that thrives in the sun, in well-drained, even dry soil, in summer.

 

Sea Holly 'Violetta'  is a hybrid plant, belonging to the Apiaceae family (formerly Umbelliferae), obtained by cross-breeding Eryngium alpinum and Eryngium bourgatii. The plant, anchored on a large taproot, forms a clump of heart-shaped, deciduous to semi-evergreen, spiny and tough basal leaves, which are deeply incised and medium green in colour. The flower stalks rise up to 70 cm (28in) from the ground and the vegetation spreads over a diameter of 50 cm (20in). In July-August, the conical capitulum inflorescences, carried at the top of stems with small green leaves, are initially grey and then violet and deep blue. They measure 8 to 13 cm (3 to 5in) in height and 5 cm (2in) in diameter, and are topped by a collar of narrow, highly divided, blue bracts measuring over 6 cm (2in) in length. The cone is made up of tiny flowers that will not produce viable seeds.

 

Eryngium zabelii 'Violetta' grows in deep, dry, well-drained soil, even poor and rocky soil, in hot and sunny locations. This superb perennial brings an interesting texture to borders, thanks to its unique and graphic habit. Plant it in rockeries and borders in a dry garden alongside shrubby Salvias, Perovskia, Pennisetums, Stipa, Gaura lindheimeri 'Snowstorm', Verbascum bombyciferum 'Polarsommer', and Salvia nemorosa 'Caradonna'. The fresh or dried flowers of Eryngium are widely used in bouquets.

Eryngium zabelii Violetta in pictures

Eryngium zabelii Violetta (Flowering) Flowering

Flowering

Flower colour blue
Flowering time July to August
Inflorescence Umbel
Flower size 7 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Evergreen
Foliage colour medium green

Plant habit

Height at maturity 70 cm
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Eryngium

Species

zabelii

Cultivar

Violetta

Family

Apiaceae

Other common names

Sea Holly, Blue Eryngo

Origin

Cultivar or hybrid

Product reference888901

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30% 4,13 € 5,90 € 8/9 cm pot
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From 5,90 € 8/9 cm pot
37
From 5,90 € 8/9 cm pot
45
From 6,90 € 8/9 cm pot
107
From 4,90 € 7/8 cm pot

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Planting and care

Eryngium zabelii 'Violetta' should be planted from September to April in a well-drained, dry, poor and rocky soil in full sun. In heavy soil or in excessively wet regions, it may tend to collapse. Mix compost, sand and gravel with your garden soil and plant in a raised bed. Don't forget to place gravel at the bottom of the hole for good drainage. It can be susceptible to powdery mildew, root rot and the appetite of slugs and snails.

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Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow, Rockery
Type of use Border
Hardiness Hardy down to -20°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 6 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Stony (poor and well-drained)
Soil moisture Dry soil, Well-drained and deep

Care

Pruning instructions Cut the flower stalks as they appear.
Pruning Pruning recommended once a year
Pruning time August to September
Disease resistance Very good
Overwinter Can be left in the ground

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