I was curious about people's successes with clems near black walnut trees, thanks for posting.
I was afraid to put any clems in my northern back yard bordered by black walnut trees. I had read that Clematis armandii was immune to juglone on several websites, but was afraid to try.
I successfully wintersowed some clematis seeds, Clematis tangutica 'Radar Love' so I am trying several seedlings. I will also try some in my front garden, safely away from the black walnut trees.