SHRUBS > SPIRAEA - JAPONICA

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SPIRAEA - JAPONICA GUIDES

pink flowering spirea japonica shrub growing outside

A neat choice for mixed borders in many gardens , Spiraea japonicasare attractive deciduous shrubs which bring home the bacon interest throughout much of the year .

These shrubs are audacious plants which can thrive in many garden .

In the UK and elsewhere , S. japonicahas been cultivated widely as an decorative garden flora .

pink flowering Japanese Meadowsweet growing outside

‘Albiflora’

Numerous discover cultivars have been bring out which are in widespread use inbeds and borders , or in mixed hedge .

Overview

PreferredFull Sun or Partial Shade

ExposureExposed or Sheltered

Height1 – 1.5 M

spiraea japonica shrub with red leaves growing outdoors in front of other shrubs

Spread1 – 1.5 M

Bloom TimeSummer

PreferredMost fertile soils

tiny white flowers of Spiraea ‘Albiflora’

‘Albiflora’

MoistureMoist but well - drained

pHAny

It is native to Japan , China and Korea and has naturalised elsewhere.2Spiraea japonica . ( n.d . ) . Weed of the Week . recover March 24 , 2023 , fromhttps://www.invasive.org/weedcd/pdfs/wow/japanese-spiraea.pdf

Goldflame variety of Japanese Meadowsweet with orange, red and green leaves

‘Goldflame’

Why GrowSpiraea japonica?

S. japonicais a popular garden bush in large part due to its attractive piddling five - petalled , white or pink prime bear in teemingness on the plant in short raceme , panicle or corymbs in summertime .

Some mixture are also prized for their colour - change foliage , which can open one chromaticity , mature to Green River in summertime , then develop attractive autumnal shadiness subsequently in the year .

Another intellect why this is a popular garden bush is that it is very easy to grow is that it thrives in many spot in the UK and can cope with all but the most extreme of condition .

young spiraea japonica plant growing in a garden bed

S. japonicacan fit well into cottage gardens and conventional garden designs , urban garden , coastal garden , and a range of beds and moulding in configurations across the UK .

Varieties

Some bring up cultivar UK gardens should consider include :

Where To Grow

S. japonicathrives in full sun or partial or dappled shade .

It is H6 stout in the UK and can be point in both sheltered and exposed position .

In terms of grime , it will do best in chalky , loamy or flaxen dirt , with moist but well - drained conditions .

spiraea japonica shrubs with various shades of pink flowers growing in a field outdoors

The plant can tolerate a all-embracing range of grunge pH , including more alkaline conditions .

Where the land is moist but does not become boggy or waterlogged , S.japonicawill work very well in mixed borders .

There are larger cultivars which work well for the back of a perimeter , and also somewhat belittled cultivars which can work well in the center of a assorted border , and dwarfS. japonicawhich can process well further forwards or even , in some instances , in container .

spiraea japonica shrub with green leaves covered in rain droplets

SomeS. japonicacan also turn well as part of a hedge scheme .

Planting

S. japonicasare stalwart shrubs which are well found in fall , or during milder spells of conditions over the winter months or early spring .

However , you’re able to plant aS. japonicaat any time of the year as long as you ensure that the plants are well - water during validation .

As with many other bush , verify you embed at the same depth as it was in the pot it came in , or in its old locating .

someone using secateurs to prune the stems of a spiraea japonica growing outside in the winter

mildly firm in the soil around the root word of the flora , and irrigate it in well .

Mulch around the al-Qa’ida of your new bush with a good quality organic compost or wood chip shot mulch .

Ongoing Plant Care

Once set up , as mentioned above , S. japonicais an excellent low - sustentation , easy - to - care - for plant .

irrigate the plant on a regular basis during dry spells as it becomes established .

Once established , however , these shrubs should not need extra watering , except when rain is in particularly short supply and there is a foresighted full point of drought .

a young Japanese Meadowsweet seedling growing in a hole in the ground surrounded by grass

S. japonicawill not generally require veritable feeding .

However , it is a honest idea to apply a new mulch of constitutive matter after pruning to advance young growth .

These shrub are generally comparatively untroubled by common pests and diseases .

close-up of the white and yellow flowers growing from a cherry tree

S. japonicablooms in summertime on growth produce in the same yr .

For these types of summertime bloom Spiraea , it is a good thought to abbreviate back all growth in March to around 30 cm from the land .

This encourages lot of young growth which is more lifelike in chromaticity than older shoot and so is a good idea , in particular , forS. japonicawhich is grow not only for its flowers but also for its colorful foliage .

It is of import to at least cut back to within 1 - 2 buds of the older woody structure of the shrub , and to take away any numb , damaged or weak stuff .

“ There are a few pruning approaches you’re able to take with these Spiraeas , ” share Master Horticulturist Dan Ori .

“ One method acting I advocate is cut back to two buds of the current year ’s growth unless you want to reduce the size of it , as allow this easy creep in size seems to help the longevity of the plant . ”

If you have an older , matureS. japonicawhich has not been regularly pruned in this agency , renovation pruning can meliorate performance and visual ingathering significantly .

Take out a proportion of the old stems to open up up the centre of the works and encourage fresh raw growing .

obviate pruning these bush over the wintertime calendar month , as this can chair to novel shoot becoming damaged by rime .

Propagation

Once you have aS. japonicashrub in your garden , it can quite easily be circularize by taking cuttings to obtain new plants .

The best selection is to take semi - right cuttings of non - flowering shoot from the plant in around July or August .

The cut should be around 15 atomic number 96 long .

Place the cutting , with settle hormone to improve the chances of success , in a light , sandy potting mix and place in a cold frame or another suitable maculation before plant out your newS. japonicathe following yr .

CombineS. japonicawith other relatively broken - maintenance bush and perennials in a mixed border and you could create a win , low - effort , high - encroachment garden blueprint .

Remember , this is a non - aboriginal plant so consider mix it with aboriginal metal money which will be complemental , while providing more benefits for the local wildlife .

Companion Planting

S. japonicacan work well in planting schemes with a range of other plant .

One option to consider is growingS. japonicawithin a Japanese - inspired garden .

You might turn it with other Japanese metal money includingacers , coniferous tree , andflowering cherry trees , for example .

Some other examples of plants which may work well in a mixed perimeter with Spiraea include ( but certainly are not confine to ):

References