Hydrangea macrophylla Stellar Bleu
Hydrangea macrophylla Stellar Bleu
Hydrangea macrophylla Stellar Bleu
Hydrangea macrophylla Stellar Bleu
Hydrangea macrophylla Stellar Bleu
Hydrangea macrophylla Stellar Bleu
Bigleaf Hydrangea, French Hydrangea, Lacecap Hydrangea
I planted this hydrangea in heather soil to which I added a slow-release fertilizer specifically for acidophilous plants, a good amount of slate, and a bit of humus. It was planted in a pot on a northeast-facing terrace and watered exclusively with rainwater or demineralized water. Unfortunately, it only produced a few blue blooms, the rest being BRIGHT PINK! Very disappointed as I have never pampered a hydrangea so much...
Holly, 20/08/2024
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This plant carries a 24 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.
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Description
The Hydrangea macrophylla Stellar Blue is a variety of Hydrangea with original and charming flowering. The large inflorescences are composed of dozens of triple florets, blue and white in colour at the tip. In non-acidic soil, the colour of the flowers will be more pink. The visual effect is incredibly romantic and will allow for very beautiful compositions in the garden. Of medium size, this Hydrangea will form a more or less spherical bush and can be grown in a container to decorate a terrace. Hardy, it is best placed in a shady position, in neutral to acidic soil.
The Hydrangea macrophylla is a deciduous bush, native to Japan, where its beauty has been appreciated for centuries and mentioned in poems dating back to the 8th century! In this country that attaches great importance to plants, festivals are even dedicated to this bush. This Hydrangea is a variety obtained by Japanese breeder Toyokazu Ichie, who has more than a dozen hybrids to his credit since 2010. The full name of this bush with the plant breeders' rights (PBR) certificate also reveals its origin: Hydrangea macrophylla STELLAR (R) BLUE 'Kamosere Gokigenyo' PBR.
The main attraction of this variety lies in the dome-shaped inflorescences, 20 cm (7.9 in) or more in diameter, which display a beautiful blue colour in acidic soil. In slightly alkaline soil, they turn pink, which is typical for this species. The uniqueness of Stellar Blue lies in the triple florets, composed of small increasing size stars, imbricated, with whitish tips during development. The overall effect is quite charming. This flowering has the added benefit of being perpetual, so the bush displays flowers throughout the summer, from July to September. Afterwards, dried bouquets can be enjoyed indoors for a few more weeks. A medium-sized bush, about 1.20 to 1.50 m (3 ft 11 in to 4 ft 11 in) in all directions, this Hydrangea, like all H. macrophylla, is not strictly a ericaceous plant, but prefers neutral to acidic soils rich in humus. These types of soils will ensure the best blue colouration of the flowers. It is very hardy (-20°C or colder, although severe frosts can damage the tips of the branches, they easily regenerate after pruning in spring). Easy to grow, it can live for a very long time.
The Stellar Blue Hydrangea, a classic in romantic flower beds, is a generous plant that will make a big impact in open ground as well as in containers on a terrace or balcony. To maintain a poetic atmosphere, pair it with plants such as the 'Belle Etoile' Mock Orange with its simple white flowers, the touching 'Versicolor' Autumn Camellia whose flowering from October to December follows that of Stellar Blue, or even the 'Waterlily' Star Magnolia with its graceful double flowers of pure white that herald the beginning of spring.
Note: The colour of the flowers of Hydrangea macrophylla varies depending on the soil pH. Traditionally blue varieties turn pink in neutral or alkaline soil. To maintain a beautiful blue colour, mix heath soil or blonde peat into your garden soil and apply aluminum sulfate (slate contains it) or alum every spring.
Hydrangea macrophylla Stellar Bleu in pictures
Plant habit
Flowering
Foliage
Planting and care
Plant the compound hydrangea macrophylla Stellar Blue in spring or early autumn, preferably in a slightly shaded location, for example against an east-facing wall, or even north-facing. In very cold regions, it may be prudent to protect its stump with a thick mulch. Keep it sheltered from cold and drying winds. It does not necessarily require acidic soil, but appreciates a deep, moist, well-drained, and fairly fertile soil. In poor soil, enrich with a good base fertilizer before planting and mix the existing soil with a substrate containing some compost.
If the soil is dry at the base of the wall, place the plant at least 30-40 cm (11.8-15.7 in) away from the wall and incorporate a quantity of well-decomposed compost to better retain moisture in the soil. After planting, be careful of slugs, which are quite fond of young leaves. Very hardy, it can be planted in cold regions without worry. Water regularly during hot periods to prevent the foliage from wilting during dry spells.
Planting period
Intended location
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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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