Has anyone tried growing “Secret Garden Musk Climber” from seed?

I tried some diploid pollen on it and got lousy seed set - one per hip, only the first flower per cluster set - and while the achenes are large, they’re mostly shell. Still waiting for germination. I think I’d be inclined to try it as a pollen parent in the future instead.

I’d try it as pollen parent too. It occasionally sets OP hips. It might be worth growing some of seedlings out to see if you could select for something more fertile. It acts very much like a triploid in my opinion.

I was going to say the very same thing; someone ought to do a chromosome count!