As it turns out, the weeds are pretty rife around the McFarlin's lupine, but I'm making progress in clearing the immediate areas around the plant and opening a couple of isolated plants to better sunlight.
The main offender was Pokeweed, but I did have to remove some resprouting trees as well. Some large sedges and grasses went for good measure.
I think the regular lupine crew will notice a difference this week.