Aqueminianswered grow question 3 years ago Your PPM is way to high. You burned them and caused nutrient lockout by overdose. You should be at 1000 in flowering.
You really have to start out very lightly and slowly work up. A good rule to go by is go up 50ppm a week with new strains you haven't run in DWC. For OG strains go up 100ppm till you get to about 800, then go up 50ppm a week. I start at 350-450 ppm. The lower your pH the stronger the nutrients solution is. So 1000 at 5.9 for a plant that size is poisonous.