The blackberry brambles have been in bloom for at least a few days now.
The white flowers, on the right side of the trellis in the first photo, belong to the triple crown blackberries. The middle bloom has lost its petals and is beginning to produce fruit.
The pink flowers, on the left side of the trellis in the first photo, belong to the chester blackberries. Both chester and triple crown blackberries are thornless.
Bumblebees were visiting the flowers when I took these photos on Saturday (June 15th).
I wrote about pruning blackberries in a previous post.