When you cut, cut above a leaf node and that should send out two more branches with more flowers each. Each growth tip will produce buds: remove the inferior buds for a single fuller bloom per branch or leave all buds to develop for a more crowded bunch of blooms on shorter stems.

How long it takes for branches to develop into blooms varies by variety. By mid-September you ought to have plenty of flowers on at least some of the 100 plants.

Congratulations on your pending marriage.