See the set up specs, and check out the photos and let me know what you think.
-week 9
-2 white widow AF in 3 gallon pots
-6 total plants in 36”x48”x60”H tent
-150 W HPS & 1000 W LED (24” High above top cola)
-FFOF soil with perlite and powdered lime
-FF Trio & Bembe & Cal/Mag
-blue bird Temp and RH controllers


I have only fed them every 5-10 days, averaging once a week. Following Fox Farms feeding schedule at half strength with Cal/mag.

I did recently up the flower nutes by adding more tiger bloom with a mixture of Bembe starting week 7.
This problem has to have been happening since at least week seven I just didn’t notice until the start of week 9, after symptoms worsened and only at the top cola were about 5 leaves, starting to turn orange on the edges and tips w/some spots. Tips of the leaves curled up and went brown, gray, dead looking. I could barely see this happening. Upon noticing it happen to be feeding night and I instead flushed with about 1 gallon each plant using PH water only until I had Half a gallon runoff. Then I raised the lights to the max height. About 20 hours ago I fed them a little early 4 days after flushing, and I added a little more cal/mag (7mL) to my feed.

I think its one of the following:
1. Light burn
2. P or K nute burn
3. Cal/Mag deficiency

Let me know what you think please. I’m a first timer here and 3-4 weeks from harvesting. This is 911 time. Let me know if you need any more information to assist.