Viburnum cross-pollination

I planted a highbush cranberry last year thinking it was self-fertile but recently found out they are not. I also recently ordered a nannyberry. Do these two viburnums cross-pollinate or do I need to order one more of each?

Highbush (viburnum trilobum) should be self fertile.
Somebody tell you other?

But, if some other viburnum blooms at the same time, it quite likely can cross pollinate.

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