Possibly a magnesium deficiency? 2 pics, 2nd week flower

The redish/brown burns start from the veins on the main fan leaves.. then the tips/edges of those leaves start to yellow and/or burn and then twist upwards towards the sky.

Magnesium deficiency? I give them botanicare pureblend pro and cal mag atm.. up the calmag? all about 1/4 doses. These are purple wreck in happy frog soil..

Or am i reading it wrong? Only had a few plants do this, all the rest have liked my nutrient doses

Input welcome

I think it's either nute burn
or its leaves are tryna turn purple

What nutrient do u use?

Damn i guess so.. maybe these are just sensitive phenos.. i went ahead and flushed with 3x.. ill look again tonight and see how shes doing. Buds are getting all sticky now at least

Highest ive gone with the pure blend pro is about 1/3th the reccomended dose with the transitional dose (half bloom, half grow). And then always 1/4th dose cal-mag.

Yeah it looks like a micronute toxicity, too much Iron or something. While there was never a definitive answer, I've seen that before with time-release chemical ferts mixed into the soil and repotting in a new organic mix fixed em right up.

Eeep! I flushed 2 days ago and now its gotten much worse.. gotta be burn for sure.. thought flush should stop it though

More pics..

Okay well with lack of further input im gonna go with micro nute toxicity for now.. maybe i used the grow half of the two part formula too long for these phenos..what im guessing at least. My other purple is happy still atm and its in same phase, but its definitely a more indica pheno. Dropped the grow part on the healthy plant, and just continueing water to try and save the poor damaged one.. has 4 fan leaves left

k deficiency , do u use all the nute series ? , blent a banana peel with some water to make it a mush and poor it on top of soil and try to mix it with it