Answer: Soft, brown leaves on lilacs usually indicates over watering or overly wet soils so I'd check the drainage where the lilacs are planted. When soils retain too much water, oxygen is driven out and the roots can suffocate. You might want to dig the affected lilac and either raise the soil level a little so it drains faster or try growing it in a container until it recovers. Then replant in an area that drains quickly. Wish I had more suggestions for you!
Q&A Library Searching Tips