Terwilliger Blvd / North I-5 On-Ramp Park

Every Sunday morning from May through October for several years, I walked across the Terwilliger Bridge (over I-5, here in Portland Oregon) to catch a bus downtown to volunteer at the Visitor Information Center. There's a pedestrian underpass with stairways that go under the on-ramp to I-5, and up onto the bridge's sidewalk.

Apple Maps air view

The nooks and crannies of the down/up stairway were variously landscaped, now mostly forgotten. The most neglected spot was a littered, weedy triangular pocket at the apex between Terwilliger Blvd and Interstate 5. Aside from picking up litter, I wondered what could be done for this island of urban blight.

At home, the sunflower seeds scattered under our bird feeder sprouted, ruining our lawn. I thought maybe they might naturally grow there without much help.