Many a garden owner has a magnificently blooming lilac in their garden, perhaps for decades, which blooms wonderfully every year and requires practically no care. Still others worry about an ailing plant that produces yellow leaves but hardly any flowers. There are various reasons for this behavior.
Nutrient deficiencies are one of the possible causes of yellow leaves
Yellow leaves on lilacs: an overview of the causes
Yellow leaves on lilacs do not have "the" cause, instead a whole range of different reasons come into question. The most important thing, however, is that you stay calm and first conduct thorough research into the cause - and only then act. Incorrect fertilization, for example, can finish off the already weakened plant, although it would have had a good chance of fully recovering.
Wrong location:
If the lilac is too dark, it often develops yellow leaves. A lack of flowers can also be an indication. In this case, only transplanting will help.
nutrient deficiency:
In particular, lilacs on nutrient-poor soils and with mulched / planted root disks quickly suffer from a lack of nutrients. If the leaves turn very light in color while the leaf veins remain dark, this is a case of chlorosis. Then you have to help with an iron fertilizer.
waterlogging:
Lilac prefers a rather dry soil, waterlogging can quickly end fatally. Replant the shrub and prevent with good drainage.
tips
The "lilac epidemic", a fungal disease, can initially lead to yellow leaves.