Hydrangea serrata Bleuet
Hydrangea serrata Bleuet
Hydrangea serrata Bleuet
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Description
Hydrangea serrata 'Bleuet' is a beautiful variety of Lacecap Hydrangea recently selected in Brittany by Pierre-Michel Kerneur. The plant is vigorous, with a lovely rounded habit and abundant flowering in July-August. Its inflorescences are flat corymbs, of modest size, whose colour varies depending on the soil. They will be a beautiful bright blue in acidic soil, and pink in neutral soil. It can be planted in borders or even in a large container on the terrace, in partial shade or shade.
Hydrangea serrata is a mountain plant that thrives in cool and humid climates, resistant to cold (-20°C), less sensitive to late frosts, belonging to the Hydrangeaceae family. They thrive in rainy, cool, and less sunny climates. Preferring partially or significantly shaded exposures, they tolerate morning sun if their feet stay cool. These shrubs prefer acidic to neutral soils, rather rich and humus-bearing.
'Bleuet' Hydrangea forms a rounded bush in the space of 10 years, which can reach 1.50m in height and spread 1.20m wide. Its deciduous foliage is dense and provides a beautiful backdrop for the flowering. This foliage consists of lanceolate, dark green leaves with finely toothed margins, traversed by lighter veins. These leaves tend to turn red in the sun and colour in autumn before falling. Above this vegetation, the inflorescences, small flat corymbs, succeed from July to August. Each one is composed of a few large sterile florets surrounding a core of tiny fertile florets with a frothy appearance. Their shades vary depending on the soil pH, but also, to a lesser extent, depending on the plant's exposure.
The 'Bleuet' Hydrangea easily finds a place at the foot of a north or east-facing wall. It also highlights entrances and pathways and creates pleasantly mounding small hedges with ball-type hydrangeas, such as macrophylla hydrangeas. Vary the sizes and colours of the flowers. Plant shade perennials at the base of hydrangeas, including Brunneras, Hardy Geraniums, or Tiarellas and Heucherellas that will create flowered carpets in front of their round silhouette.
Hydrangea serrata Bleuet in pictures
Plant habit
Flowering
Foliage
Botanical data
Hydrangea
serrata
Bleuet
Hydrangeaceae
Cultivar or hybrid
Planting and care
Plant Hydrangea serrata 'Bleuet' in spring or early autumn, preferably in a slightly shaded location, for example against an east-facing wall or even north-facing. It is best to protect it from cold, drying winds.
It does not require acidic soil but appreciates deep, moist, well-drained, and fairly fertile soil, optionally enriched with a good base fertiliser before planting. If the soil is dry at the base of the wall, place the root ball at least 30-40 cm away and incorporate a generous amount of well-decomposed compost to better retain moisture in the soil. It is very hardy and can be planted in cold regions without worry.
As for pruning, remove faded flowers at the first bud or on the pair of buds directly below. Cut back a quarter to a third of the older stems at the base, when the plant is mature, to promote the formation of young shoots. Perform this pruning every year in March if your climate is cold. If you have relatively mild winters, you can do it at the end of autumn by removing the faded flowers.
Planting period
Intended location
Care
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).
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.
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