This page contains links outside Washington State University which provide an option for finding further information. No endorsement of products or information at these sites is implied. Toward the middle of summer, woody perennial weeds that were small in April turn monstrous. Blackberries, Scotch broom, English ivy, and other introduced plants settled nicely in the maritime Northwest and are continual nuisances in landscapes.
Perennial weeds come back year after year, dying down to the roots in winter.
Unlike morning glory, these woody shrubby invaders form permanent branch and truck structures and never disappear from sight. Blackberries begin ripening in late July. Juicy, fragrant, and delicious in pies and jam, they do have some redeeming characteristics. One of my favorite childhood memories is learning to bake blackberry pie for my grandfather. Both of these were introduced, probably as food sources.