Hi all, I live in a townhouse with a medium-sized planting bed out front. It has one arborvitae to the side with about 5 ft of planting space in front of it. I'm wary of the shade it and the neighbor's tree casts--the planting space would get about 4 hours of sunlight a day, mostly in the late morning-midday. Because of that, I've tried to plant things that would tolerate some shade--bleeding hearts, columbine, azaleas. Nothing comes back the next year. Other plants that may receive similar light but aren't near the arborvitae do just fine.
Am I missing something peculiar about planting near an arborvitae? Too much competition? Soil pH? I can supplement with a ton of compost this year if someone has ideas on what plants would have a fighting chance in this space.
TIA!