Hydrangea macrophylla Royalty Kardinal Violet
Hydrangea macrophylla Royalty Kardinal Violet
Hydrangea macrophylla Royalty Kardinal Violet
Hydrangea macrophylla Royalty Kardinal Violet
Hydrangea macrophylla Royalty Kardinal Violet
Hydrangea macrophylla Royalty ®Kardinal Violet
Bigleaf Hydrangea, French Hydrangea
Young plant in very good condition upon arrival, undoubtedly due to the excellent packaging, even though it was small; it was just under 15 cm (6in). Nevertheless, its good condition suggests a promising establishment upon planting.
Sandra P., 18/05/2018
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Description
Hydrangea macrophylla 'Kardinal Violet' stands out for its vigour, its ability to produce lateral buds, its large flat flowers with intense colours, and the abundance of its flowering. This large bush offers superb flat inflorescences with purplish-violet tones if grown in acidic soil, taking on reddish hues in neutral soil. Hydrangeas are not strictly acid-loving plants. They grow very well in ordinary, moist but not chalky soil. It tolerates a slightly sunny location that will reveal the intensity of all its colours. It is easy to control through pruning,
Hydrangea macrophylla 'Kardinal Violet' is a recent creation, resulting from the cross-breeding of H. macrophylla and H. serrata, among others. All these hardy plants belong to the Hydrangeaceae family, originating from China and Japan.
'Kardinal Violet' is part of a series of lace-cap cultivars selected for their flat cyme inflorescences. This hydrangea has a bushy and rounded habit, as wide as it is tall, reaching over 1.5m (5ft) in all directions. From July to October, it produces large inflorescences measuring 30 to 35cm (12 to 14in) in diameter at the end of its branches. They are slightly rounded and composed of small fertile and sterile flowers with striking dimorphism. The well-developed fertile florets are arranged on the periphery of a large "heart" where tiny fertile florets are tightly packed. The colour varies depending on the nature of the soil. This flowering appears on deciduous, bright green foliage. The leaves are opposite, reaching a minimum length of about 15cm (6in). They are simple, ovate to elliptical, ending in a pointed tip, and coarsely toothed like a saw. Hydrangeas can live for at least 50 years.
With its assertive personality and intensely coloured flowers, 'Kardinal Violet' is perfect for illuminated flower beds. Hydrangeas are well known for brightening the north side of houses. It will thrive in a non-burning east or west exposure, both in flower beds and hedges. This vigorous variety can be easily controlled through pruning, allowing it to also be planted in a large pot, which can be placed on a terrace or near an entrance. Pair it with magellanica fuchsias, Rodgersia, silver candles, ferns, and annual impatiens, or plant spring-flowering bulbs in front of its generous silhouette. Enjoy its magnificent flowering in the garden or indoors for a long time.
Note: The colour of the flowers of macrophylla hydrangeas varies depending on the soil pH. Traditionally blue varieties turn pink in neutral or alkaline soil. To maintain a beautiful blue colour, mix ericaceous soil with your garden soil and apply aluminium sulphate (slate contains it) or alum stone every spring.
Hydrangea macrophylla Royalty Kardinal Violet in pictures
Plant habit
Flowering
Foliage
Botanical data
Hydrangea
macrophylla
Royalty ®Kardinal Violet
Hydrangeaceae
Bigleaf Hydrangea, French Hydrangea
Cultivar or hybrid
Planting and care
Plant in spring or early autumn, preferably in a slightly shaded position, for example against an east-facing wall or even north-facing. In very cold regions, it may be prudent to overwinter it in a cold greenhouse or conservatory. Protect it from cold, drying winds. It does not require acidic soil, but appreciates deep, moist but well-drained, fairly fertile soil, possibly enriched with a good base fertiliser before planting. 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. Very hardy, it can be planted in cold regions without fear.
As for pruning, remove the faded flowers on the first bud or on the pair of buds directly below. When the plant is mature, prune the older stems back to the base by a quarter or a third. This will encourage the formation of young shoots. Carry out this pruning every year during March and April.
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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