Iโd say look up what other sites online say to do for water and light with these plants. Greg is not very correct in my experience. If I only watered my pitcher as often as they say it wouldnโt be doing very well.
It might be overwatering? My dill was struggling but came back after a 5min soak in the tub and letting it dry out in direct sun. It might also be sunburn? In which case bottom watering would also do the trick!