Your opinion is important to us!

We are constantly making our site better and more user friendly for you. Any dispute, whether praise or criticism is important to us!

We welcome your suggestions!


Lubera stops plant deliveries to the UK
Due to Brexit, we are not able to deliver to the UK. We are working on a solution on how we can continue to bring a wide range of Lubera plants to the UK and directly to our customers' homes in the future. However, such a solution will not be available before 2022 or 2023.

Mountain hydrangeas

Hydrangea serrata from Lubera

When you buy Hydrangea serrata (mountain hydrangea), you get a beautiful ornamental shrub with filigree flowers, which is more compact in appearance than other hydrangeas.

No image available Hydrangea 'Blaumeise'

Hydrangea macrophylla 'Blaumeise' has pink to dark blue flowers

Instead of: £17.90 * From £16.40 *

Hydrangea 'Libelle'

Hydrangea macrophylla 'Libelle' forms pure white florets with pink or blue internal...

Instead of: £16.90 * From £15.40 *

No image available Hydrangea 'Zorro'®

Hydrangea macrophylla 'Zorro' has pink to blue flowers on dark violet stems

From £16.90 *

Hydrangea macrophylla 'Kardinal'

Hydrangea macrophylla 'Kardinal' has dark red flowers and can be planted in a sunny...

Instead of: £17.90 * £16.40 *

No image available Small-growing Hydrangea 'Bluebird'

Hydrangea serrata 'Bluebird' forms light white-pink ray florets and strong pink flowers...

Instead of: £22.40 * From £20.40 *

Small-growing Hydrangea 'Cotton Candy'®

Hydrangea serrata 'Cotton Candy' pink flowers, depending on the location

Instead of: £22.40 * From £20.40 *

No image available Small-growing Hydrangea 'Koreana'

Hydrangea serrata 'Koreana' has pink to blue flowers and low growth

From £21.90 *


More information about Hydrangea serrata


There are many hydrangea fans who prefer the more delicate representatives with the decorative, plate-shaped flower shape.

The well-informed hobby gardener knows that there are true flowering wonders to be discovered in this category, which also score points with their natural charisma. With a maximum growth height of about 1.5 metres, the mountain hydrangea (or tea of heaven) fits even into a small front garden and is also very easy to maintain. The flowers start blooming as early as June and are often followed by a splendid colouring of the leaves in autumn. Take a look at our diverse Lubera assortment: thanks to the numerous cultivars, you will find these types of hydrangeas in shades of blue, in the most beautiful mauve red, in pure white or with interesting, two-coloured flowers.



Delicate flowers with an immense variety of colours


In spite of its graceful appearance, Hydrangea serrata is a robust shrub that thrives best in light shade. And there is another special feature: with the right fertilisation or the right pH value in the soil, you can, if necessary, make a pink flowering variety shine in an intense shade of blue. Discover your favourite in the Lubera garden shop!

  • The 'You & Me 'Forever' variety, for example, with its magnificent, double flowers, provides pure romance in the garden and could result in eternal love
  • The small growing variety 'Koreana' is a little jewel with pink or blue flowers
  • The variety 'Cardinal' shines in a strong pink tone, which often changes to a rich red colour


Special featuresHydrangea serrata from Lubera


The wild form of the mountain hydrangea originates from the wooded, humid mountain valleys of Japan and Korea. Hydrangea serrata used to be considered a subspecies of the mophead hydrangea (Hydrangea macrophylla), but now it forms its own group (species) among the hydrangeas. As a shrub, it grows broadly bushy in the garden. It does not grow as large as the mophead hydrangea; it has smaller flowers and narrower and longer leaves. And of course, there are its plate-like flowers with many small, fertile inner flowers and the loose wreath of large mock flowers, which often form a two-coloured work of art. Mountain hydrangeas are so-called semi-shrubs since their shoots are not completely woody, which unfortunately makes some varieties a little susceptible to frost damage.


Suitable location


In keeping with its original habitat, Hydrangea serrata prefers a site in semi-shade, which has sufficient soil moisture but is permeable. A location under trees is well suited, as long as they are deep-rooted and thus provide sufficient space for the hydrangea to grow. It also grows in the sun, but it is essential to provide a sufficient water supply. Furthermore, the soil should be rich in nutrients - a lean soil should, therefore, be improved with compost or bog soil. A sheltered location is also ideal. If you want to buy a mountain hydrangea and keep it in a container, an acid soil (bog beet, rhododendron soil) can be used very well. In this way, a blue hue is retained during flowering or appears for a longer period.


Caring for Hydrangea serrata


Blue-flowering Hydrangea serrata plants particularly like nitrogenous fertilisers with little phosphorus, otherwise, you can gladly resort to organic fertilisers such as compost or horn shavings. Fertilisation before the main bloom is sufficient when the plant is planted out. If you keep your plants in conatiners, you should apply a liquid fertiliser from March to August. In general, the plants need a lot of water, i.e. the soil should never dry out. Too much nitrogen from August makes the plants susceptible to frost damage, so it is best to stop fertilising in late summer.


Obtain or maintain a blue flower colour


The blue flower colour in mountain hydrangeas occurs under the following conditions:

  • The soil must be very acidic (pH value 4 to 4.5)
  • There must be sufficient aluminium in the soil, which at a low pH value is transferred to the soil water
  • The original colour of Hydrangea serrata is pale pink - with other flower colours the colour change does not work
  • No phosphorus-based fertiliser is used

The pH value of the soil affects the flower colour of this species of hydrangea, similar to that of mophead hydrangeas. In general, the colour turns bluish in very acidic soils, while violet to pink flowers is obtained in slightly acidic to alkaline soils. A low pH value in the soil can be achieved by incorporating rhododendron soil, leaf compost and conifer needles. This works best in sandy soil, which is naturally already slightly acidic. If the soil is loamy, you should consider a local soil exchange, as this has a good buffer system. This is less complicated if you keep them in containers: simply buy the right soil (rhododendron soil).

Aluminium is also required for blue flowers. You can buy this in the form of alum (potassium aluminium alum) in a pharmacy. Spread up to 2 tablespoons of it around the hydrangea - little by little it will be absorbed by the plant. Alternatively, you can enrich your watering with three grams of alum per litre and water your hydrangea with it weekly for about four weeks from the beginning of May. If this is too complicated for you: special hydrangea fertilisers with a blue dyer are available in specialist shops. Do not expect quick results!

You should also pay attention to your watering water because tap water is usually relatively rich in lime. Rainwater is better suited for watering hydrangeas.

Avoid the application of fertilisers with a high phosphorus content. If a lot of phosphorus is applied, aluminium phosphate compounds that are difficult to dissolve are formed in the soil. The result is this: an unsuccessful labour of love when dyeing the plant blue because the necessary aluminium is then bound and thus not available to the plant.




When you buy Hydrangea serrata, you do not have to deal extensively with the subject of cutting, as this plant does not have to cut. However, if you would like to carry out a cutback or form cut, it is best to choose the month of March. You should always remove dead and possibly frozen shoots of the hydrangea. Weakly growing plants can also get a radical pruning at the base by removing some old shoots or pruning them back completely, but this will have a negative effect on the fullness of flowers for a while.




A very harsh winter can affect some Hydrangea serrata plants, so that an entire flowering season can be cancelled in the new garden season. In a rougher climate, you should mulch the shrubs in autumn with a thick layer of leaves covered with fir twigs. You can also temporarily cover the shrubs with a winter fleece if the frost persists. You should protect young plants in particular. If necessary, you should cover a potted plant with garden fleece and insulate the plant pot well - or place it in a frost-free room (conservatory).

Tag cloud