Leggy perennials

[Dauber33]

My black eyed susan, purple coneflower and daisies are all getting leggy. Where they cant stay up themselves. Nothing different in how i treat them but the past two years theyve stretched out. Any ideas why and what i can try?

 

[oneeye]

They may need more Sun. Sometimes when the Sun moves from S to N or N to S depending on the photoperiod and location. Some plants that are planted close to a fence or house lose a few hours of their Sun. In other words, the plants are getting more shade time now than in the Spring.

 

[Esther Knapicius]

you can try to just cut them in half around the month of June. I have been doing that to my Phlox, and they get thicker, stand better, but still flower well.