The blackberry is coming on just as the Scotch broom is fading. Maybe, when they’re finished, it will be safe to go off OTC allergy meds until next spring. Maybe.
The blackberry problem in the Pacific Northwest defies just about any other pernicious plant problem I’m aware of–except maybe kudzu in the southeast. It gives one a special understanding of Little Shop of Horrors. Any piece of land untended for a year will have become an impenetrable thicket.