Well, you may have answered your own question... your PH is 5.8 and you're not feeding it. What would happen to YOU if you didn't eat for 3 months? If they're autos, pitch them, if these are photoperiods, you can turn this around...
First and foremost, you need to reactivate your root system... get yourself some ReCharge and use it once a week along with some molasses (1/2 tsp ReCharge per gallon and 1 tsp molasses). Make sure your PH levels are between 6.0 and 6.5 with EVERYTHING you give her... Next, you've got to get the PLANT something to eat - get some NPK into her! Go slowly at first since the roots probably aren't doing much at this point. Trim up the dead leaves (even plants like to LOOK good)... She also looks terribly dry... start paying attention to her!
Good luck...