Although the bright pink rose campion (Lychnis coronaria) is not native, it’s a good temporary filler to prevent erosion on the slope, as low junipers take their time filling in.
And, they seem perfectly at home with the unexpected native daisies that also decided to bloom!
Note: those little flags you may notice in the photo are used, in this case, to remind me of where the little bluestem grasses are planted. They’re also great at preventing erosion, yet are usually among the last to come up in early summer.