Hydrangea serrata Vicomte de Kerlot - Mountain Hydrangea
Hydrangea serrata Vicomte de Kerlot - Mountain Hydrangea
Hydrangea serrata Vicomte de Kerlot
Mountain Hydrangea, Tea of Heaven
Despite the heatwave, I took the risk of ordering this hydrangea. It arrived in excellent condition and has established perfectly.
Dominique, 03/07/2025
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Description
Hydrangea serrata 'Vicomte de Kerlot', selected in Brittany by Pierre-Michel Kerneur in 1990, stands out for its vigour and its spectacular, flat inflorescences as delightful as they are spectacular. The bush, which exceeds a man's height, is adorned all summer with flowers in a shade of pink leaning towards mauve, speckled with white, gathered in large short stems. It prefers moist non-limestone soils, and a semi-shaded to gently sunny exposure. Of beautiful stature, but moderately hardy, it settles in a bed or in a flowering hedge in regions with mild winters.
Hydrangea 'Vicomte de Kerlot' descends from Hydrangea serrata. It belongs to the large Hydrangeaceae family, native to Japan and Korea. This selection forms a well-ramified bush, with an erect habit, which will reach 2m (7ft) in height and 1.5m (5ft) wide, depending on growing conditions. Flowering takes place from June to September. It takes the form of numerous flat inflorescences, composed of small vaporous fertile flowers, mauve pink in neutral soil or blue-mauve in acidic soil, mixed with larger sterile florets in the same colour palette but lighter. The flowers are prettily marked with white towards the centre. This hydrangea is deciduous. The cold resistance of this variety is evaluated at -10°C (14°F) over a short period. The dark green foliage is strongly veined, and dentate along the edges. Hydrangeas are robust plants that can live at least 50 years.
Particularly appreciating moist soils and a semi-shaded exposure, 'Vicomte de Kerlot' is perfect in regions with mild winters. Hydrangeas are well known for brightening up the north side of houses, and this one will be happy in an east or west exposure that is not scorching, in flower beds as well as in hedges. Hydrangeas are not strictly ericaceous plants; they appreciate light soils rich in organic matter and humus. Pair them with large rhododendrons, camellias, azaleas, magellanica fuchsias, or annual impatiens, or plant spring-flowering bulbs in front of their round silhouette. Enjoy their sumptuous flowering in the garden but also in the house for a long time.
Hydrangea serrata Vicomte de Kerlot - Mountain Hydrangea in pictures
Plant habit
Flowering
Foliage
Botanical data
Hydrangea
serrata
Vicomte de Kerlot
Hydrangeaceae
Mountain Hydrangea, Tea of Heaven
Cultivar or hybrid
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. 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 is not afraid to be planted in a cold region.
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).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
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 planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
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.
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