@ai6yr @msbellows @davidcampey
Our first house had a back yard completely full of blackberry plants. It took us three years to manage to cut it all back, and during that time one blackberry plant managed to grow under the back door of the garage while another went up the gutter spout. The things grow so fast in the Seattle area it's almost impossible to stop them.
The mounds of blackberries were so high we never realized we had a well in the back yard until we cut them back.