Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Hydrangea macrophylla Koria
Bigleaf Hydrangea, French Hydrangea
Arrived during the peak of the heatwave, held upside down by the postman! A lovely surprise: it was in full flowering and in an incredibly fresh state. Well done! and Thank you!
MP, 16/08/2022
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Description
Coming from the Netherlands, Hydrangea macrophylla 'Koria' or Hortensia Koria is a beautifully shaped bushy shrub. Its flowers, gathered in large flat inflorescences, bloom in a row of strongly dentate petals of a magnificent pure white, around a pale mauve centre. Elegant and remarkable for the beauty of its flowers, it has its place in all types of gardens and can be used in borders, as a standalone plant, in a large pot, in a humus-rich, well-drained, preferably acidic and fresh soil in a semi-shaded to shaded exposure.
The 'Koria' Hortensia is distinguished by its perfect habit and the elegance of its flowering. This shrub is barely taller than wide, reaching 1.25m (4ft 1in) in height and 1.20m (3ft 11in) in width. From July to September, these small fertile and sterile flowers, with striking dimorphism, form very graphic inflorescences, pure white with a pale mauve centre. Its lovely sterile florets form a lace crown around a tight cluster of sterile florets, ranging from green to violet. The flowering is accompanied by medium green deciduous foliage. The leaves are opposite, reaching a minimum length of about ten centimetres. They are simple, ovate to elliptical, ending in a pointed tip, with serrated edges. Hydrangeas can live for at least 50 years.
The 'Koria' Hortensia will bloom even in shade. Hydrangeas are well known for brightening the north side of houses. This one will thrive in a north or east exposure, in the morning sun, in borders as well as in hedges. This variety is suitable for cultivation in open ground or in large containers, which can be placed on the terrace or near the entrance. Although these plants dislike limestone, they are not strictly ericaceous plants. Combine them with Magellan fuchsias, annual impatiens, or plant spring-flowering bulbs in front of their round silhouette. Enjoy their sumptuous flowering in the garden or in the house for a long time.
Note: The colour of Hydrangea macrophylla flowers varies depending on the soil pH. Traditionally blue varieties turn pink in neutral or alkaline soil. To maintain a beautiful blue colour, mix heather soil or blonde peat with your garden soil and apply aluminum sulphate (slate contains it) or alum stone every spring.
Hydrangea macrophylla Koria in pictures
Plant habit
Flowering
Foliage
Planting and care
Plant Hydrangea macrophylla 'Koria' in spring or early autumn, preferably in a slightly shaded location, for example against an east-facing wall, or even to the north. Keep it sheltered from cold, drying winds. It does not require heath soil, but appreciates a deep, moist but well-drained, fairly fertile soil, possibly enriched with a good base fertilizer before planting. If the soil is dry at the base of the wall, place the root ball at least 30-40cm (11.8 - 15.7in) away from the base of the wall 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 faded flowers on the first bud or on the pair of buds directly below. Cut back to the base by a quarter or a third the oldest stems, when the plant is mature, to promote the formation of young shoots. Carry out this pruning every year during the months of 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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