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Hydrangea macrophylla Blauer Zwerg

Hydrangea macrophylla Blauer Zwerg
Bigleaf Hydrangea, French Hydrangea, Mophead Hydrangea

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Perfect condition despite a neck reconditioned package due to moisture.

Isabelle, 16/10/2024

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This plant carries a 24 months recovery warranty

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Value-for-money
A floriferous variety, with a compact habit, producing medium-sized ball-shaped inflorescence of a beautiful intense blue in acidic soil. They renew themselves throughout the summer against a background of glossy, deep green foliage. This variety is hardy, easy to grow, and equipped with sturdy stems that give it good support in the garden.  
Height at maturity
1.20 m
Spread at maturity
1 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time April, September
Recommended planting time February to April, August to October
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Flowering time July to September
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Description

Hydrangea macrophylla 'Blauer Zwerg' is a floriferous variety with a compact habit, which has proven itself in the garden as well as in flower potsThis bush, about 1.2m (4ft) tall and 1m (3ft) wide, forms medium-sized ball-shaped inflorescences with a beautiful intense blue colour in acidic soil, or a purplish blue in more neutral soil. They continue to bloom throughout the summer against a backdrop of glossy, deep green foliage. This variety is hardy, easy to grow, and has sturdy stems that give it good stability in the garden.

 

Hydrangea macrophylla 'Blauer Zwerg' was obtained in Germany in 1965 by August Steiniger. It is one of the many hybrids resulting from the cross-breeding of hardy species. They belong to the Hydrangeaceae family, native to China and Japan. This shrub has a bushy and compact habit, reaching a height of about 1.2m (4ft) tall and 1m (3ft) wide at maturity. From July to September, its sterile flowers form round inflorescences. Their colour ranges from purplish pink to dark and intense blue depending on the acidity of the soil. They are carried by sturdy stems, one year old or older. The flowering is accompanied by small, resistant, bright green foliage that takes on carmine purple hues in autumn before falling. The leaves are opposite, reaching about 10cm (4in) in length. They are simple, ovate to elliptical, ending in a pointed tip, and strongly toothed like a saw. Hydrangeas can live for at least 50 years.

 

'Blauer Zwerg' is a superb variety, with excellent hardiness and very generous flowering. Hydrangeas are well known for brightening up the north side of houses. This one will thrive in an east or west exposure that is not too hot, both in flower beds and hedges. This variety is suitable for cultivation in the ground or in containers, which can be placed on a terrace or near an entrance. Although these plants dislike limestone, they are not strictly speaking ericaceous plants. Pair them with bush fuchsias or 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 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 Blauer Zwerg in pictures

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

Plant habit

Height at maturity 1.20 m
Spread at maturity 1 m
Habit Irregular, bushy
Growth rate normal

Flowering

Flower colour blue
Flowering time July to September
Inflorescence Cyme
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour green

Botanical data

Genus

Hydrangea

Species

macrophylla

Cultivar

Blauer Zwerg

Family

Hydrangeaceae

Other common names

Bigleaf Hydrangea, French Hydrangea, Mophead Hydrangea

Origin

Cultivar or hybrid

Product reference883231

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Planting and care

Plant in spring or early autumn, preferably in a slightly shaded position, for example against an east-facing wall, or even to the north. In very cold regions, it may be prudent to overwinter it in a cold greenhouse or in the conservatory. Keep it sheltered from cold and drying winds. It does not require ericaceous soil, but prefers 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 concern.

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

Best planting time April, September
Recommended planting time February to April, August to October

Intended location

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

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 Very good
Overwinter Can be left in the ground
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