It's evergreen. Will it stand a decidious top?

I do not know if that would interfere or not. My ignorance is of astounding dimensions; also no search online has helped here.

Drasaid,

If I recall correctly, you wrote to me last summer and asked about the potential for topworking your cherry laurel (Prunus laurocerasus) with capulin cherry (Prunus salicifolia/Prunus serotina var salicifolia) grafts. I replied to you, but never heard back; I imagine that signals got crossed somehow.

Anyway, as I said then, I think that it would be worth trying to graft capulin cherry selections onto your existing tree. I'm not well-familiar with cherry laurels, but a quick internet search revealed that they seem to be quite similar to capulins in form, flower, and foliage. Since I am incapable of performing phylogenetic analysis, all I can say is that, based on this layperson's evaluation of gross cosmetic/physical characteristics, the two species would appear to be closely-allied raceme cherries.

Now, it could turn out that there is no possible graft-compatibility between the two. However, I think that you would stand a much better chance with capulins than with scionwood of peaches, cherries, plums, etc. The latter are all classified within the genus Prunus, but my (strong) sense is that they are so distantly related to P. laurocerasus that topworking would not work. (Certainly I have never tried using capulin seedlings -- and I get plenty of volunteers -- as rootstocks for peaches or apricots or whatever.)

I would be glad to supply you with capulin scions at some point, BUT my trees are flushing growth strongly at the moment, so I doubt whether I would be able to find any twigs with dormant buds. However, there should be plenty of material available when the current flush hardens, a little later in the season.