Linden Tree Is Dropping Black Sand-Sized Specks

Question From: Minneapolis, Minnesota, United States
Q: My linden tree is 20 years old. It is dropping black specks the size of sand which must be cleaned up daily. I want to spray to rid tree of whatever is causing this. Deck and table must be cleaned daily. How can I prevent this or clear up problem. thanks. bob teese

A: Sounds to me like tar spot. A tree that size needs treatment using professional equipment. I recommend a certified arborist. To find one in your area go to and enter your zip code. Best And Happy Yardening, Nancy