First and foremost... you do not want to EVER transplant an auto... that's the reason you want to germinate them in the pot they're going to finish in... so that's a big NO from me!
Quite honestly, I think you're UNDERwatering here... droopy leaves are caused by either overwatering (the state of being constantly wet), underwatering or nitrogen toxicity... you're not giving them too much nitrogen and they certainly don't look like their growing in a swamp - so I'm fairly certain you're not giving them enough water... plants in flower will start drinking a lot and, if I'm not mistaken, you've got them in clay pots which will dry up the soil very quickly as well. Do not go by a set "every X number of days" when you water - you've got to go by what your plant tells you. Best way to do that is to lift the pot up to see how lightweight it is.... if it's light, give the plant a drink or a feed, whatever is next on their agenda... And don't be measely with the water.. get at least 10-20% runoff - really soak it, especially if they're growing in clay pots.
Good luck!