High, good that you are using the PK 13/14 now but you also need to feed with a Basic Blooming nutrient. From this moment till flushing 2 weeks before harvest the solution that you give can have EC 1.6 And make sure that the pH is around 6.5
There is still too much Nitrogen in the soil. You need to flush the Nitrogen out. Just follow these steps to flush out the Nitrogen from the soil.
Make up water with low levels of nutrients (1/4 strength or adviced dose from the PK 13/14). You want to take out the bad and replace with the good.
Give 3x the pot size – Use enough water so that you're giving the plant 3x as much water as the volume of the pot. It may take a little while. Remove all runoff water immediately, you don't want your plant to suck the bad stuff back up!
Give regular strength nutrients at the end – Make up one last batch of nutrient water at regular strength, and give this to your plants. You are replacing what you took out with what you want to be there – fresh, pH'ed nutrient water!
Make sure there is a fan blowing over the top of the growing medium to help it dry out so plants don't get as droopy from being overwatered. There should be plenty of air circulation in the grow space, with access to lots of fresh air.
Raise your grow lights up a few inches while your plant is recovering. Your plant definitely needs plenty of light, but you don't want to make it work too hard during the recovery period.
Wait a few days for improvement – Although your plant may get droopy at first, you should start to see improvement within a few days. Try not to water it again until the top inch is starting to dry. It's not recommended to flush a plant two times in a row. After the first flush you should have flushed out what was hurting the plant in the soil. At this point, it's time to give your plants some TLC while you get things back on track.