I did a google search for this plant. It looks as if it is available in the US for the cut flower trade but has not yet reached the garden trade; one article I read said it might not be available to gardeners for quite some time. This is a quote from that article which I have linked below: "unfortunately, this is only available in the cut flower markets since it is a registered brand of the Hilverda Group and licensed out only to commercial cut flower growers, so it may be years before those of us who are interested in growing this plant in our gardens, could possibly obtain one."

Here is a link to a blog where the plant is mentioned and the blogger has given the name and number of a cut flower grower who might be able to give you some info about availability: Green Trick Carnations

Holly

Here is a link that might be useful: Dianthus barbatus Green Trick 'Temarisou'