5 Main Reasons Why Lilac Leaves Curl: Note for Gardeners
Sometimes summer residents and gardeners encounter a phenomenon where the leaves on lilac trees begin to curl.
The reason for this may be hidden both in the lack of care for the tree and in diseases of the lilac.
Why do leaves curl?
The first and most common problem is insufficient watering. Not every gardener knows that lilacs need watering even in mid-October, especially if September is hot.
Lilacs are sensitive to herbicides, so curling leaves may indicate that they have been exposed to them.
Warm, humid weather and dense bushes lead to lilacs becoming infected with diseases. The plant may suffer from:
- bacterial rot;
- powdery mildew;
- fusarium;
- verticillium wilt;
- late blight.
Lilac also reacts to pests that have settled on it by twisting its leaves, for example, the ash borer, which is also called the lilac borer.
Another reason is that the crown is too dense and the plant’s roots are not sufficiently developed.
