help!! look at pics!!

I need some help as you can tell from pics. One plant is really not doing very well and now the others are slowly startin to look the same. Any ides would be appreciated.

uhhhh...what seems to be the problem?

its flowering right? there shouldnt be a problem if it is

Wrong pics. can't seem to be able to resize any hints?

I'm downloading photoshop about 45mins! If you look at front left plant you can see a mild colour change on lower leaves. On the plant that's not in the pics this is much, much worse. leaves yellowing and going brown and crispy.