Trees and shrubs

Azalea japonica: the outdoor azalea


Azalea japonica is a small, evergreen heather shrub that produces very pretty flowers in spring.

In summary, what you need to know:

Last name : Azalea japonica
Family : Ericaceae
Type : Shrub

Height
: 100 to 200 cm
Exposure : Partial shade and shade
Ground : Acid, heather earth

Foliage
: Persistent -Flowering : April May

Measuring between 1.5 and 2 meters depending on the variety, azalea japonica is an ideal shrub to complement a cluster of heather plants.

> For your indoor azaleas, follow the guide

Planting azalea japonica

It is important not to do not expose the azalea japonica too much to the sun and preferably choose a partially shaded place.

  • The azalea needs a well-drained, humus-bearing soil.
  • The azalea tolerates partial shade and even shade very well, but dreads full sun.
  • The addition of heather soil is necessary for this plant.
  • Follow the advice of planting heather earth plants

In order to have a spectacular bloom, do not hesitate to addheather plant fertilizer.

Caring for an azalea Japonica

Easy when properly installed, maintaining azalea shouldn't be a big deal for you.

Be sure to keep the soil moist, especially in hot weather or prolonged drought.

The implementation of a mulch with a base decorated with maritime pine avoids 1 in 2 watering and brings acidity to the soil.

Watering the azalea outdoors:

The shallow roots of azalea japonica are the most water-hungry and require regular watering in spring, but especially in summer.

  • To limit the number of waterings, mulch the base of your azalea japonica with maritime pine bark, this keeps the soil moist and cool.
  • Finally, it is necessary water in hot weather or prolonged drought.

Size of azaleas

No pruning is really essential for an azalea in the garden, but it can come in handy sometimes, if only to reduce or balance the antlers.

Training size:

Pruning is done during the first 2-3 years of the azalea on young shoots and aims to promote branching.

  • Pinch off new shoots with fingernails just above a leaf.
  • Repeat the operation regularly so as to create as many new ramifications as possible.
  • This pruning has the disadvantage of altering the flowering of the azalea, but it will make it denser, more robust and more flowering for the following years.

Maintenance pruning of azaleas:

The azalea can be pruned throughout its life, although it is recommended to prune as little as possible to keep a beautiful flowering each year and a natural shape.

  • Start by removing dead, fragile wood and branches with little or no leaves.
  • Once the flowers have wilted, prune just below the peduncle.
  • To reduce the length of the branches, wait until the end of flowering.
  • Be careful, severe pruning of your azalea compromises the next flowering.

Good to know about azalea japonica

This shrub is actually a rhododendron at small flowers, remarkable in early spring for its beautiful colorful bloom and glowing.

Azalea japonica forms a pretty, compact ball that highlights generous blooms as well as the persistent dark green of its leaves.

Note that azalea japonica can lose its leaves in severe frost, but this has no effect on the plant. (Photo © Roberto Zocchi)

  • Azalea japonica withstands negative temperatures in the range of -15 to -20 °

Smart tip

To stimulate the development of the shrub, straw the base of the tree to maintain humidity.

Preferably choose an acidic mulch such as bark of maritime pine.


Credits for images : Japanese azalea ‘Red Wing’ © Aygul Bulté

Video: Azaleas How to Prune u0026 Propagate (October 2020).