Hydrangea macrophylla Cloudi
Hydrangea macrophylla Cloudi
Hydrangea macrophylla Cloudi
Hydrangea macrophylla Cloudi
Hydrangea macrophylla Cloudi®
Bigleaf Hydrangea, French Hydrangea
young plant received in good condition
Béatrice, 06/11/2022
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Description
Hydrangea macrophylla 'Cloudi' is a variety with relatively flat inflorescences, quite different from the large usual heads observed in this type of hydrangea. Its summer flowering spreads over several months, from July-August to September-October. Its pastel flowers, blue in acidic soil or pink in neutral to slightly alkaline soil, give it an undeniable romantic charm. Medium-sized, this beautiful, easy-going bush will be happy in semi-shaded areas, isolated, or in the heart of a mixed bed.
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! Festivals are even dedicated to this bush. It can be found growing wild on the island of Honshu (which is home to the capital Tokyo), and it was introduced to Europe around 1789. It belongs to the Hydrangeaceae family.
According to some sources, 'Cloudi' is the result of cross-breeding between Hydrangea macrophylla and H. serrata, which would explain the relatively flat shape of the flower, as well as its preference for wet soils. It is a variety that produces beautiful pastel blue inflorescences in acidic soil, turning pale-pink in neutral to slightly alkaline soil, clearly visible on the medium green mass of foliage which they almost completely cover. In summer, it blooms for many weeks, between July and September. Its inflorescences consist of very narrow and very tight fertile flowers in the centre, and sterile florets of a larger surface on the periphery, the whole recalling certain flowers of Viburnum. This particular morphology combined with the softness of the colouring gives a romantic aspect to this variety. A medium-sized bush, about 1.2m (4ft) high and wide, it has an average growth of 15 to 25cm (6 to 10in) per year. Its dimensions can easily be contained by annual pruning. Like all Hydrangea macrophylla, this bush is not a strictly ericaceous plant. It prefers neutral to acidic soils, while tolerating a bit of limestone.
'Cloudi' arouses emotion with its pastel colour and graceful flowers. You can plant it isolated under the light shade of large trees, but it will also be valuable in mixed beds of acidic-soil plants. Choose plants with staggered flowering throughout the year to frame that of 'Cloudi'. In a romantic register, plant it with a botanical camellia like C. transnokoensis, with charming little white flowers appearing in late winter and early spring. The purple pink single flowers of Magnolia 'Susan' will then take over, closely followed by those of Kalmias, mountain laurels with original small white, pink or red flowers, depending on the variety.
Hydrangea macrophylla Cloudi in pictures
Plant habit
Flowering
Foliage
Planting and care
Plant in spring or early autumn, preferably in a semi-shaded position, for example against an east-facing, or even north-facing wall. In very cold regions, it may be wise to protect its stump with a thick mulch. Keep it protected from cold and drying winds. It does not require ericaceous soil, but appreciates deep, moist but well-drained, fairly fertile soil, possibly enriched with a good base fertiliser before planting. It can tolerate some limestone. In slightly limestone (alkaline) soil, dig a hole 70 to 80cm (28 to 32in) in all directions, and mix the in-situ soil with 1/3 ericaceous soil and 1/3 compost.
If planting near a wall and the soil is dry at its base, place the root ball at least 30 to 40cm (12 to 16in) away from it and incorporate a quantity of well-decomposed compost to better retain moisture in the soil.
After planting, watch out for slugs which are quite fond of young leaves.
Very hardy, it is not afraid to be planted in cold regions.
Water regularly in hot periods to prevent the foliage from wilting during dry spells.
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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