I'm having the same problem.... I thought this link would answer my question..
but here's some info I found on drooping leaves.. in early stages of flowering
Leaf Curling Down - When the leaves curl under and burn at the tips and margins it’s usually a sign that the nutrient level is too high.
Solution - Check and adjust the pH level as necessary. Flush and decrease the nutrient level.
6) Droopy Leaves - Leaves that are drooping are most likely caused by over watering/under watering or lack of light.
Solution - First off, for soil, Place you finger into your soil a few inches and see if it's dry or wet. If over watering is your problem, increase the temperature and airflow to evaporate some of the excess water also you can add some h2o2 when watering to help the roots still receive O2. **Warning!- Chronic over watering can lead to soggy roots and stagnant, icky soil. if you slide the plant out of the pot to check the soil and it stinks or is soggy then transplant into fresh dry soil. For a hydroponic system, check to see if your medium is dry or wet before you water (or your pump comes on). If your medium is still pretty wet, then you are over watering and need to water less often. If your medium is very dry before watering, under watering is your problem, just water more frequently. And lastly, If lack of light is the problem, Add more light.
Sorry bout' the bold... it's how it pasted
