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Hydrangea macrophylla Blauer Prinz

Hydrangea macrophylla Blauer Prinz
Bigleaf Hydrangea, French Hydrangea, Mophead Hydrangea

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More information

A medium-sized, floriferous hydrangea, with late flowering. The inflorescences in small balls are nestled in the foliage. Their colour will be a light blue in acidic soil or a soft pink in neutral soil. They fade beautifully, turning green and then deep purple-red at the end of the season. Superb in a flowerbed, it performs well in a large container and its flowers are magnificent in bouquets.
Flower size
8 cm
Height at maturity
1.50 m
Spread at maturity
1.30 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to May, October to November
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Flowering time August to October
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Description

Hydrangea macrophylla 'Blauer Prinz' allows for the creation of large beds or superb hedges in partial shade or shade. It is a medium-sized ball-shaped hydrangea, which blooms abundantly quite late in the season, and remains decorative until November. This round shrub is adorned with inflorescences in small but numerous balls nestled in the foliage, whose colour is determined by the soil: light blue in acidic soil or soft pink in neutral soil. They fade beautifully, turning green and then deep red at the end of the season. This variety is particularly suitable for making bouquets.

 

Hydrangea macrophylla 'Blauer Prinz' is one of the many hybrids obtained from H. macrophylla and H. aspera, among others. The Hydrangeaceae family is native to China and Japan. This variety is characterised by vigorous growth, excellent floribundity, and late flowering. It usually blooms from the end of July. This shrub is barely taller than it is wide, reaching 1.5m (5ft) in height and width at maturity, with relatively fast growth. Its dense and round inflorescences measure from 8 to 12cm (3 to 5in) in diameter. The sterile florets successively change from green-yellow to pale-yellow before turning mauve-blue or pastel pink depending on the soil pH. At maturity, the flower balls are gradually invaded by different shades of green, red, purple, or violet. The tiny fertile florets, on the other hand, are barely visible, submerged in the globular head. The flowering is accompanied by dense, medium green, leathery, deciduous foliage in winter. It often takes on a beautiful purple hue in autumn, depending on the soil and the year. Hydrangeas can live for at least 50 years.

 

'Blauer Prinz' is a perfectly hardy shade variety. Hydrangeas are well known for brightening the north side of houses. This one thrives in the east with morning sun, or in the north, in beds as well as hedges. This variety is suited for cultivation in open ground as well as in large containers placed on a terrace or near an entrance. Even though these plants fear limestone, hydrangeas are not strictly acid-loving plants. They thrive in all non-calcareous but rich soils. Pair them with magellanica fuchsias or annual impatiens, or plant spring-flowering bulbs in front of their round silhouette. Enjoy their magnificent flowering in the garden or in fresh or dried bouquets in the house for a long time.

Hydrangea macrophylla Blauer Prinz in pictures

Hydrangea macrophylla Blauer Prinz (Flowering) Flowering
Hydrangea macrophylla Blauer Prinz (Foliage) Foliage
Hydrangea macrophylla Blauer Prinz (Plant habit) Plant habit

Plant habit

Height at maturity 1.50 m
Spread at maturity 1.30 m
Habit Irregular, bushy
Growth rate fast

Flowering

Flower colour blue
Flowering time August to October
Flower size 8 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Hydrangea

Species

macrophylla

Cultivar

Blauer Prinz

Family

Hydrangeaceae

Other common names

Bigleaf Hydrangea, French Hydrangea, Mophead Hydrangea

Origin

Cultivar or hybrid

Product reference1000321

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Planting and care

Plant in spring or early autumn, in a slightly shaded position, for example against an east-facing wall, or even to the north. Protect it from cold and drying winds. It does not necessarily require ericaceous soil, but appreciates deep, moist but well-drained, fairly fertile soil, possibly enriched with a good compound fertiliser before planting. It does not tolerate limestone, which causes its foliage to yellow and can cause it to wither. 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.

Planting period

Best planting time March, October
Recommended planting time February to May, October to November

Intended location

Suitable for Woodland edge
Type of use Border, Back of border, Container, Hedge
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, Deep, loose, fertile

Care

Pruning instructions 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.
Pruning Pruning recommended once a year
Pruning time March to April
Soil moisture Moist soil
Disease resistance Good
Overwinter Can be left in the ground

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