This may sound silly, but do your plants seem to perk up during the day and droop at night? I've noticed this a couple of times now. For instance, all day today they looked fine. Then I left to go to a show, and 2 hours later they're droopy. It seems like everytime I look at the plants after about 10 or 11pm, they start to droop a bit. Then when I wake up and look at them around 7am when I wake up, and they're smiling at me - looking just great. I'm not overwatering, and the soil is fine. They're on a 18/6 light schedule. Lights go out at midnite, and they turn on at 6am, which is my sleep schedule. FYI - I put about a cup of distilled water in the pots every couple of days or so (9" pots). I watered them last on Friday.