I truly do not like arranging flowers. They rarely stay where they’re supposed to. They move and shift and get all out of order. On the other hand, when I pick flowers from my garden, my florist doesn’t make house calls, so I have to do it myself. When that’s the case, I find the simpler, the better. Hydrangeas help you hold other flowers in place because they act as natural frogs. With just a couple of varieties of flowers, just aim for a little symmetry. Experiment with the relative heights and different vase choices. See pics below. Don’t forget to remove any leaves that would be underwater. They are future scum!