Please help diagnose

Hello everyone. If you are reading this, thank you. I’m growing a white widow auto from seedsman. Using ffof and their trio of nutes. I’m on 50 of this grow. The plant has been flowering for about 2 weeks. I’m using ro water ph roughly 6.7. I’m feeding 2 tsp of big bloom 4 ml of calmag and 1 tsp of tiger bloom. Getting what I thought was nite burn but I flushed and symptoms still persists. I think it may be potassium deficiency but don’t want to over feed. See pictures please and thank you for the help.

Anyone??

Based on the leaves curling up i would say heat but i'm still a noob so don't shoot me if i'm wrong. How far away is your light.
Also probably in combination with nute burn.

No worries. I doubt it’s heat related. I’ve grown the same strain in much higher temps. The highest the grow gets is 82 and gets down to 72. The light is 20” above and is a cheap Chinese viparspectra 600. I’ll keep an eye on the temps. Nute burn is a concern but I flushed it well. Still baffled. Thanks for the reply. This is only my second grow.

Ah i see. And has it gotten worse after the flush because i think once burned the damage is done.

You didn't say what you fed your plant during veg! Anyhow... you said you are on day 50, that's something like 35 - 37 days of veg, and 13 - 15 days of flower. And you are using...

1 tsp (roughly) / 4ml c/m
2 tsp / 10 ml BB
1 tsp / 5 ml TB

And you are using FF OF...

That is to much nutrients for a auto growing only 50 days in FF OF,,, to begin with, autos by default don't need a lot of nutrients, period! I have found most auto strains compared to the same strain in photo format need a little less than half of nutrients as their photo counterpart, so as rule of keeping a good green thumb, using less nutrients is always a better idea when growing auto(s). Anyway, the last analysis that I saw on FF OF was 5-7-4, which makes it great for flowering right out of the bag. That's why when you read any recommendations directly from FF (inc) relating to FF OF they only really recommend one using BG (only if needed during veg, veg periods greater than 45 days) and BB only until mid flower. So in my opinion you used to much nutrients and way to soon!

FF OF has changed through the years, now it act more like a entire grow mix, (that only needs topping off at the start of flower), instead of what it once was, as it would only get you through to the start of flower, then you would use FF(s) other nutrients like TB, KMKY, etc, etc... so I would quit using TB until the end of week 5, and pump up the BB until then, if you don't have room to add 1 or 2 inches of FF OF to top off your pot to get you through to harvest...

So if you don't have room to simply top off your pot, I would use...

feed, water, feed (per 1 gallon ro water)

until the end of week 5
1/4 tsp epsom salt
1 tsp c/m
4 tsp BB

week 6...
1/4 tsp epsom salt
1/2 tsp c/m
3 tsp BB
1/4 tsp TB

week 7...
1/4 tsp epsom salt
2 tsp BB
1/2 tsp TB

week 8...
2 tsp BB
1/2 tsp TB

... until harvest or flush...
2 tsp BB