Phosphorous. What are you feeding? If you're already feeding a flower nutrient, you might want to add some PK 13/14, or something similar with added P (like GH Koolbloom liquid).
Phosphorous. What are you feeding? If you're already feeding a flower nutrient, you might want to add some PK 13/14, or something similar with added P (like GH Koolbloom liquid).
If you are using products simmilar to what az2000 mentioned your PH may be the culprit as P has the smallest ph availability range. Once the PH in your medium drops under 5.5 is when you may start to see the signs of P deficiency that you are seeing now.