This time I am just stuck. My plants are developing well and its day 41 on of approximately 57-62 of flower. What am I doing wrong? Any help is very much appreciated!! Leafs start yellowing on Top next to Mainbuds. Strain is "Critical +" under 3590 Crees in Soil (around 800-1000 PPFD). Only issues so far where light Cal-Mag deficiencies beginning of flower around week 2. Ph watering with Canna Flores around 6.3 Watering with EC 1.4 (base Ec is 0.4). I am using PK 13-14 at 5ml per Liter at the moment. Also adding Calmag at around 0,5 ml per Liter.
One more picture - just to make sure ( the first picture is from top of a plant - this one is more from the middle):
looks like pH is not right by looking at the leaves,,,heres a picture of leaves with pH trouble looks like your leaves ,,,mac,,
What was the cause with your PH? Too high? Too low? I was thinking about going with 6.5-6.6 to see if its getting better!
Could be mag, looks like mag. But as you say leaves starting to yellow near top then it could be leaves to close to the light. I got a hlg 550 that I had a 18" from canapy that was all good untill the last few weeks were they started turning and crisping near at the top most leafs. Just the top leaves working overdrive For so long being too close. So could be..