If you're willing, you can support each individual bloom with a short piece of bamboo stake by tying it to the stem just below the flower head. In the future, plant varieties with single flowers. Because they don't have as many petals, the blossoms are lighter and stems have an easier time of supporting them. Q. I had a terrible time with rabbits this year. There are many some more obvious than others.
Rabbits prefer tender young shoots and seedlings.
If you can protect these with chicken wire until the plants are past that stage, bunnies are often less interested. Fencing works, too, of course. But be sure to bury the bottom several inches in the ground so they can't burrow under it. Dried blood is an effective deterrent, especially around seedlings. Products containing dried blood are available at garden centers.