Answer: Since you know the azaleas do well, why not use more of those at least along the corners where there is a bit more light? You might try adding some Sarcococca hookeriana humilis (this is a terrific partial to full shade plant) as a contrast along with some ferns and possibly some of the very large blue hostas (they prefer deep shade) which can grow into almost sculpture-like forms with age. You might also use an evergreen groundcover for winter color, either English ivy in green or a variegated form, or Vinca minor, or even pachysandra. Lily of the valley would be a possible deciduous choice. Boxwoods will tolerate a high bright sort of dappled shade but in my experience it really is too dark for them on a northern wall, especially away from the corners where the sun never hits, the same is true for the hollies. A possible exception might be the Japanese hollies such as Skypencil which is narrow enough for a foundation planting and more shade tolerant. Aucuba might be another possibility. Sometimes it does take a bit of trial and error to figure out what will work best in a difficult spot such as this. I hope you can transplant/recycle your other shrubs. Good luck with your project!
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