Ok so I planted 3 huge herb boxes this year with all kinds of herbs. Plopped some dill seeds in one of them, and they are growing nicely. The problem is, the dill was a nice dark green color until it hit about 8" tall. Now it's not as fluffy, and a pale green with yellowing on the bottom of the stems. I was watering them daily due to the heat, but they get some afternoon shade so I water every other day now. Good soil, and the only bug I've seen was a lightning bug hiding in the leaves. Did I do something wrong???