Why are they Sagging

Hey Folks, First Grow and I am not sure what i am doing wrong but here goes: My plants are on 18/6 the lights go out at 9 am because no one is home by then, they turn back on at 3. I am using the gh flora nova series on half strength. My plants are having a tendancy to sag or droop early in the morning, which is late afternoon for them, by the time i get home they are reaching for the sky, I have no other issues however i was fighting mag deficiency a couple of weeks ago. If i absolutly need to i will post pics later today if it will help. THANK YOU ALL.

overwatering could be the problem or high humidity witch can cause the same effect as over watering

I'm gonna say you have no problems to worry about. As long as they don't progressively droop farther, you should be OK.

Anyone else?