The 'Lilac of the South' is not related to the common lilac (Syringa), only the long flower spikes of the Lagerströmia or crape myrtle resemble it. The loosestrife plant, which comes from the subtropics and tropics, is not hardy in our area and can therefore only be cultivated in pots. You can find out what else you should consider when caring for this beautiful flowering shrub in the article below.
How do I properly care for southern lilacs?
The lilac of the south prefers a sunny, wind-protected location and requires regular watering and fertilization from April to September. Annual pruning promotes flower formation. Propagation by cuttings or seeds is possible and overwintering takes place in a cool, dark room.
Which location does the lilac of the south prefer?
The Lagerströmie needs a lot of direct sun and warmth - the more the better. It is best to place the pot in a wind-protected, sunny and warm location directly in front of a bright house wall or wall. If the weather cooperates, the plant shows its magnificent flowers between July and October. However, if the summer is rainy and/or rather cold, it will only bloom towards the end of summer.
Water and fertilize southern lilacs properly
Keep the southern lilac evenly moist, as it will drop its flower buds if the substrate is too dry. Water regularly between budding and wintering, but only very little during the winter break. Also make sure that there is no waterlogging - good drainage in the pot is essential. Also between April and September, fertilize the Lagerströmie with a liquid fertilizer for flowering plants (€14.00 on Amazon), which you add to the irrigation water.
Cutting Southern Lilacs
The Lagerströmia only produces its magnificent flowers on the new shoots, which is why you should cut the bush back heavily every year after the leaves have fallen.
How to propagate southern lilacs?
You can easily propagate southern lilacs using self-cut cuttings that you stick into a mixture of potting soil and sand in spring or summer. Propagation via seeds is also possible, but these must be very fresh.
Diseases and pests
Unfortunately, the Lagerströmie is very sensitive to mildew fungi, especially in humid summers. Therefore, always ensure that the location is dry and do not water the plant over the leaves. Aphids are also quite common, but can be easily controlled.
Overwintering southern lilacs properly
The potted plant can tolerate a few degrees below zero and therefore does not necessarily have to be moved to its winter quarters before the first frost. This in turn can be dark because the Lagerströmia sheds its leaves. Put them back outdoors in May, after the late frosts. Before that, however, you should plant them in a bright and warm location from April onwards.
Tip
Southern lilacs should be repotted into fresh substrate about every two to three years. The shrub feels most comfortable in potting soil containing clay mixed with expanded clay.
