My #obedientplant is not so obedient these days. It just falls over into a big mess. Other than propping it up are there suggestions as to why this is happening and can it be trimmed earlier in the season to control the height without negatively impacting blooms.
Another thought is that some outdoor creature may be lounging on them. They came by the name Obedient Plant honestly -- as the stem is bent the plant is shaped. I've never found them willing to re-bend a second time in a different direction.