I have some summer and late summer blooming perennials that seem to just flop over when they bloom. Anything I can do to help them or prevent them from flopping?
You can use grow supports or peony rings now to help support them later, or many can be cut back 1/3 or more in early June. This delays flowering by a week or so, but keeps the plants shorter, stockier, sometimes more flowering, and less floppy.