@Jersyn, These started with the "Tip Burn" weeks ago in early flower. I am running 4 strains and "Learned" the hard way that some strains need a Tweak in the nutrients according to there lineage. (I Suppose) It was obvious, to me, that this plant is way more sensitive to flowering Nutrients than ALL My other ladies.
@Jersyn82, Spoke with Paul the breeder, and he informed me that this strain is hyper-sensitive to over feeding, so I cut back on the nutrients and am running around 400-450 PPM PH 5.6 and all temps are optimal. Best luck with yours.
This plant (From Seed0 Responded harshly to a very light nutrient feeding, It was flushed early to get it back on track. (Currently) We have 3 clones of this same plant that are looking FAR BETTER then this one ever did, It took burning her a little to adjust and grow the others out again, and better.