Beautiful Cassia just fell over
My neighbor had the most beautiful Cassia (Senna bicapsularis) and we were all looking forward to it's blooming this fall. It had about 5 3" trunks, was about 8' tall and appeared to be very healthy. It was windy here Friday and this tree was blown over and the trunks were broken off at the base. There were a lot of carpenter ants milling around the base after it happened.
We had a freeze a few years ago, this tree was killed to the ground and, as usual, came back from the base. I think the ants were devouring the old, dead stumps at the base. Do you think the ants just undermined the soil at the base of the tree causing it to fall? I didn't think carpenter ants attacked healthy trees and there was no indication that this one wasn't healthy.
Or, do these trees typically have weak wood? Any ideas will be greatly appreciated. Thanks