Why Is My Lilac Turning Yellow. Both conditions will cause the leaves to turn a lighter green or yellow. If you know that the soil is extremely moist this is most likely why the leaves are turning yellow.
Drought stress can force leaves to turn pale green or yellow and cause leaf wilting and drop stunted growth and. But I doubt it because my other lilacs in other locations are doing fine with the same watering attention. Both conditions will cause the leaves to turn a lighter green or yellow.
Lilacs are reliable shrubs in the landscape and can be trained into a tree shape by removing all but one main stem and keeping the new shoots rubbed out before they become branches.
Over watering poor soil drainage can be solved by amending the soil with sand or grit with to make a ratio of at least 30 sand to 70 soil. Reticulata the tree lilac is also susceptible. Your plant has lilac blight which affects just the leaves. 25012021 Although leaves may turn yellow and drop over time due to old age there are a few reasons why they could be yellowing that are caused by growing conditions.