I’d like to find a source for pinus parviflora on its own roots, either from seed or cutting. I see plenty of JWP on JBP rootstock but I’m on the edge of zone 4 so I’m interested in the additional winter hardiness afforded by the white pine roots. Ideally I’d like 4-6 y.o. pre-bonsai material, something ready for development and grown for bonsai but not yet styled. I haven’t been able to locate any material like this so I figured it would be worth consulting the hive mind. Thanks in advance for any leads or ideas!
Attached is a JWP I killed with an unsuccessful ground layer attempt, I’m all done with that approach

Attached is a JWP I killed with an unsuccessful ground layer attempt, I’m all done with that approach

