get ur self a soil testing kit it dose N, P, K, PH check all might be low on p,k but if all is ok and still growing well i wouldn't worry to much mine droop now and then but still growing nicely it will droop once a day for about an hour then back up till next day or even day after......also make sure you not over doing it with water and use boiled then cooled water for best results ....:thumbsup: