Hedge plants

Royal lilac - plant, care and tips on diseases


The royal lilac bears his name for a reason. It is truly the king of the lilac varieties because of its beautiful appearance and wonderfully fragrant flowers.

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The royal lilac (Syringa chinensis) is one of the most popular ornamental trees because the dense, bushy shrub bears numerous flowers that grow in panicles in spring and early summer. They are red-purple in color and spread a wonderfully intense fragrance. The leaves of the lilac, however, are beautiful dark green, oval and smooth. In addition, capsule-shaped fruit heads with winged seeds form in autumn. This type of lilac, also called Chinese lilac, is a cross between Syringa vulgaris and Syringa persica.

  • Family: Olive trees
  • Genus: Lilac / Syringa
  • Type: royal lilac
  • Botanical name: Syringa chinensis Saugeana

Growth and growth behavior of the royal lilac

The Königsfliederstrauch reaches a height and width of about four meters each. It grows between 20 and 35 centimeters per year. It is therefore ideal for solitary use in the garden. But it also forms a windproof hedge if you plant several specimens next to each other. Combinations with other flowering shrubs are very nice, so that a colorful hedge is created. Suitable partners are, for example, Weigelie, Rosenendeutzie and Bridal Sparrow. Recommended reading: Lilac as a hedge - it blooms from May.

King Lilac (Syringa chinensis)
Growth rate:10 - 20 cm a year
Height:300 - 400 cm
Spread:300 - 400 cm
Root system:Deep-rooting
Ground:moderately dry, no waterlogging
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Location and soil conditions

The royal lilac is insensitive to wind and loves a sunny and warm location. In the shade it also carries a lot of leaves, but it does not bloom very well there. The soil should be rich in nutrients and permeable so that no waterlogging occurs. A loamy, sandy soil with a calcareous impact is favorable. The royal lilac also copes well with slightly acidic conditions.

Important care measures

To water:

The robust shrub requires little maintenance. The best time to plant is in autumn, because then the royal lilac will have grown well until next spring. After planting, it must be supplied with plenty of water in the first few weeks. After that only if it is very warm and dry for days.


All lilacs are heavy feeders and are grateful for organic complete fertilizers or compost in spring. After flowering, you can fertilize again weakly. At this point, you should also remove the faded inflorescences directly at the base.


A topiary is not necessary. You just have to cut out dead branches generously. In the case of older, woody lilac bushes, you can bring about a rejuvenation in the fall by radically cutting back the main branches. The royal lilac will not bloom next year. It was only in the following year that the shrub showed its flowers again.


The royal lilac is hardy. Therefore, it does not require any special frost protection.

Combating diseases and pests

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Armillaria fungus:

The royal lilac is resistant to most diseases and pests. However, if the royal lilac grows less well or even dies and if there are mushroom fruit on top of it, then this indicates an infection with the Hallimasch fungus. The affected shrub must then be removed along with the roots.

Leaf miners:

When the leaves change color and show tiny passages, leaf miners are at work. These are tiny larvae of a species of fly that eat almost invisible passages in leaves. You must then remove the affected leaves and burn them.


If there are white spots on the leaves and flowers, there may be thrips. The best way to chase away the insects is with good ventilation and regular watering. If these measures do not help, you can also use predatory mites.