Hydrangea macrophylla Amethyst
Hydrangea macrophylla Amethyst
Hydrangea macrophylla Amethyst (Collection 1900)
Bigleaf Hydrangea, French Hydrangea, Lacecap Hydrangea, Mophead Hydrangea, Penny Mac, Hortensia
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Description
Hydrangea macrophylla 'Amethyst' is an old English variety of hydrangea that is small in size, compact, with strong stems, and its large pastel flowers express all the charm of the Belle Époque era. Its inflorescences, filled with single to double florets, remain decorative until winter and are superb in fresh or dried bouquets. Their colour varies depending on the nature of the soil and fades beautifully: baby pink in non-calcareous garden soil, they will be light blue if the soil is acidic or if the bush benefits from a bluing treatment. Like all hydrangeas, it prefers moist, humus-bearing soils. It will make a big impact in a pot, on the terrace, or in partially shaded flower beds.
Hydrangea macrophylla 'Amethyst' is a horticultural creation by Haworth-Booth dating back to 1938. It is a hybrid obtained through the cross-breeding of hardy species and varieties belonging to the hydrangea family, native to China and Japan. This modest-sized bush has a dense and rounded habit, as wide as it is tall, reaching approximately 1m in all directions at maturity. It blooms in the second half of summer, starting from July. Its rounded, slightly flattened inflorescences, measure 14 to 19 cm in diameter. They are composed of single to double sterile florets with serrated petals. They quickly colour pink in neutral soil, mauve in slightly acidic soil, or blue in very acidic soil or soil rich in aluminium sulfate. In the end, the flowers will be green, speckled with pink or violet, depending on the soil. They are borne by very strong stems, one-year-old or older. The flowering is set against a beautiful light green, veined foliage that turns yellow in autumn before falling. The leaves are opposite, reaching about ten cm in length. They are simple, ovate to elliptical, ending in a tapered point, strongly toothed. Hydrangeas can live for at least 50 years.
The 'Amethyst' Hydrangea is a lovely variety to flower a shaded terrace, the corner of a porch, or a perennial flower bed sheltered from scorching sun. The macrophylla hydrangeas are well known for brightening the north side of houses. This one will thrive in a non-scorching east or west exposure, in partial shade. Although hydrangeas dislike limestone, they are not strictly speaking plants for ericaceous soil. Pair them with woody fuchsias, annual Impatiens, plant lilies and double tulips in front of their round silhouette. Enjoy their sumptuous flowering in the garden or in the house for a long time.
Hydrangea macrophylla Amethyst in pictures
Plant habit
Flowering
Foliage
Planting and care
Plant the 'Amethyst' macrophylla hydrangea in spring or early autumn, preferably in a slightly shaded position, for example against an east-facing wall, or even north-facing. Protect it from cold and drying winds. It does not require ericaceous soil, but appreciates deep, moist, well-drained, fairly fertile soil, possibly 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 quantity of well-decomposed compost to better retain moisture in the soil. It is hardy and able to be planted in a fairly cold region. Remove faded flowers on the first bud or on the pair of buds directly below. Cut back to the base a quarter or a third of the oldest stems, when the plant is mature, to promote 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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