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Lavandula intermedia Dutch Group - Lavandin

Lavandula x intermedia Dutch Group
Lavandin, Dutch Lavender

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Received plants in "very good condition" like all the plants previously received.

Pierre le 13/11/24, 13/11/2024

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Dutch group Lavandins flower from June to September, which is not the case with the other varieties. The fine spikes of light mauve flowers are carried by long, somewhat scattered stems. The evergreen and dense foliage gives the plant a dense and fragrant ball-like habit. Decorative in winter and spring. For dry, well-drained soils in the sun.
Flower size
4 cm
Height at maturity
60 cm
Spread at maturity
80 cm
Exposure
Sun
Hardiness
Hardy down to -20°C
Soil moisture
Dry soil
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Best planting time March to April, September
Recommended planting time February to April, September to November
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Description

Lavandula intermedia (x) dutch group, a variety of hybrid lavandin, offers an exceptionally long flowering period, from June to September, which is not the case with other varieties. It has slender spikes of light mauve flowers, carried on long stems, somewhat scattered. Its evergreen foliage is magnificent, silvery-gray, dense, highly fragrant in warm climates, giving the plant a mass ball-like appearance, highly decorative in winter and spring. Lavender is synonymous with Mediterranean holidays. It evokes the sun, the song of cicadas, the dry and fragrant hillsides of the Forcalquier region, and it is a piece of this ambiance that we capture in our own gardens. For dry, rocky soils, perfectly drained, in the sun.

The genus Lavandula belongs to the lamiaceae family. This hybrid is obtained by cross-breeding L. angustifolia and L. latifolia. These two species are found in the wild in the same mid-mountain environment and naturally cross-breed. They have given rise to numerous cultivars, all easy to install in the garden, tolerant to limestone. The 'Dutch' hybrid forms a large round cushion, with vigorous vegetation, reaching 1m (3ft) when in bloom, 60cm (24in) for the foliage, and a diameter of 80cm (32in). Its evergreen leaves, wider than those of true lavender, remain gray even in humid climates. They become even more silvery when the soil is dry and the climate is warm. However, in cooler climates, what the plant gains in foliage and robustness, it loses in color and intensity of fragrance. This variety has the longest flowering period, although never very intense. Long thin stems emerge from the massive foliage ball, carrying slender spikes of light mauve flowers, highly melliferous.

There are numerous and varied uses for lavandins. In nature, these plants always live in poor, rocky, dry, perfectly drained environments. With us, it is imperative to offer these evergreen undershrubs the sunniest slope possible, in a poor, very rocky soil, even limestone, and very well-drained in winter. Naturally, they will find their place in the rockery alongside cistus, helianthemums, and artemisias and salvias. Groupings can be created in large, well-drained slopes, planting different varieties of lavender, with volumes, flowering, and foliage creating a variety of mounds. Perennials with dry soil tolerance and vibrant or soft flowering will punctuate the landscape: Linaria 'Canon Went', Salvia jamensis, gaillardias, Hesperaloe parviflora and its red spikes, adding Convolvulus althaeoïdes, a Provençal bindweed that will run everywhere between and within the cushions without suffocating them. A border of lavandins will be more beautiful overlooking a wall, with aubrietas, for example, at its feet.

Lavandula intermedia Dutch Group - Lavandin in pictures

Lavandula intermedia Dutch Group - Lavandin (Flowering) Flowering
Lavandula intermedia Dutch Group - Lavandin (Foliage) Foliage

Flowering

Flower colour blue
Flowering time June to September
Inflorescence Spike
Flower size 4 cm
Fragrance Fragrant, slightly camphoraceous
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Evergreen
Foliage colour grey or silver
Aromatic? Fragrant foliage when creased

Plant habit

Height at maturity 60 cm
Spread at maturity 80 cm
Growth rate normal

Botanical data

Genus

Lavandula

Species

x intermedia

Cultivar

Dutch Group

Family

Lamiaceae

Other common names

Lavandin, Dutch Lavender

Origin

Cultivar or hybrid

Product reference93682

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Planting and care

In nature, lavenders and lavandins always live in poor and rocky, dry, perfectly drained environments. They dislike summer watering, which makes them sick and causes them to disappear, as they are very sensitive to fungal diseases induced by the combination of heat and humidity. In winter, they absolutely need perfect drainage, and in summer, they must be kept dry. The 'Dutch' lavandin will age better in poor soil, as its growth will be slower and it will be less likely to become bare at the base. To limit this phenomenon, it is recommended to prune, from a young age, after flowering or in autumn, just above the first buds visible on the wood. Lavenders and lavandins never regrow on old wood. The clump will thus branch out more and more, remaining compact, eventually forming beautiful round and dense cushions. At planting, provide them with what they like: gravel, rocks, coarse sand, but absolutely no potting soil or fertilizers.
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Planting period

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

Intended location

Suitable for Rockery
Type of use Border, Container
Hardiness Hardy down to -20°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 5 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

Care

Pruning instructions Prune, from a young age, after flowering or in autumn, just above the first buds that can be seen on the wood. Lavenders and lavandins do not regrow on old wood. Remove faded flowers.
Pruning Pruning recommended once a year
Pruning time August to October
Disease resistance Good
Overwinter Can be left in the ground
4,5/5

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