Not tried it, but I'd not rely on it, the two are only fairly distantly related.

Also Platycladus and Chamaecyparis are not compatible - that claim results from the former placement of Nootka Cypress (now Cupressus nootkatensis) in Chamaecyparis.

Resin

Thanks, good info.

Platycladus is what the entire west coast of the USA uses as rootstock for the now Cupressus nootkatensis. It works great for their climate, however for the midwest and the east coast the majority of grafted "nootkas" perish.

Nootka grafted on Juniperus 'Hetzii' aka 'Hetzi Columnaris' is the sure thing for the midwest and east coast.

Bob Fincham used to graft Chamaecyparis obtusa to Thuja occidentalis frequently for adaptation to poor soils.

I would say that given these combination - go ahead and give Platycladus a try on Thuja occidentalis.

Furthermore, the Europeans graft "nootka" on Thuja plicata. So, plicata should also work for Platycladus given all the possible combinations thereof.

Dax

Thanks, that's interesting.