Three V. 'Blue Muffin' won't fruit well without a different selection/cultivar of Viburnum dentatum or a similar Viburnum, so I'd plan to have one of the three be a different cultivar if there aren't any others in the area and you want a good berry crop. Be aware that V. 'BM' is quite susceptible to viburnum beetles if they are in your area. I ended up shovel pruning mine because it always looked ratty thanks to the beetles, but it did fine with only a few hours of morning sun until the beetles found it. If you want variety, you can try other selections of Hydrangea paniculata. My favorite is 'Quickfire' due to the early bloom, the lacy look of the flowers, and the beautiful deep reddish-pink late summer into fall color of the flowers.

kerria japonica, hypericum calyinum,