So I’ve had some time with a few different varieties of these. This one was sold as Usuiro Chirmen from Brent at evergreen but later he indicated he believed it to be something else, Une if I remember correctly. never had any issues with it in the ground other than rabbits chewing at it. Late cold snaps will ruin flower buds, but it always grew well following the snaps. I’ve got another Omoi No Mama that has acted the same In the ground that I plan to dig this spring.
I had a matsubura red that rabbits killed but it wasn’t a particularly strong grower to being with. And a benichidori that behaved similarly. I wouldnt hesitate to try growing any of them again because I think they make incredible bonsai. I’d just be sure to keep em safe from rabbits/squirrels/chipmunks and if in a pot, protect in winter from really cold temps,