Cant figure out whats going wrong. Please Help

Problem:
Dry fan leaves with tips and edges curving up, and some down. The veins are bright yellow with the portions in between trying to maintain its green color before it eventually turns brown and blotchy.


Conditions:
-The plants are 6 weeks into flower
-Advanced nutrients/ Master grower blends
-Sealed co2 room. no vents
-Temperatures 79-82 lights on/ 70-75 lights off
-Humidity, 50% all the time
-Jack Herrer Plants

The pictures are bad, so i tried to give my best description of the problem. I read the bible inside and out and i couldnt narrow it down to one condition. None of the signs really point to any one thing specific. it seems to me like most symptoms of a problem are; dark veins, yellow leaves, and it starts from the bottom, or;light veins, drying of the leaves, and starts from the top.
well my confusions is that my plants started drying, veins turning bright yellow, burning at the edges, and drying out, all from the bottom.
So you see, i think i may be having a few different nutrient deficiences at once. because my symptoms just dont match up.
im really baked right now. forgive the confusion if you are as confused as i am. haha

what are you growing in- soil or hydro
and whats ur ph at.
i found alot of the problems i had which look smilar was the PH and nuts.
i would recheck the PH and probably give them half nuts if your doing hydro, and see how they respond to that.

last thing is, ur into flowering and its no uncommon for a couple of the older fan leaves to start dying off, if its 1 or 2- i wouldnt worry about it.

TORR3NT said:

what are you growing in- soil or hydro
and whats ur ph at.
i found alot of the problems i had which look smilar was the PH and nuts.
i would recheck the PH and probably give them half nuts if your doing hydro, and see how they respond to that.

last thing is, ur into flowering and its no uncommon for a couple of the older fan leaves to start dying off, if its 1 or 2- i wouldnt worry about it.

Click to expand...

yeah one or two wouldnt bother me either. but from bottom to top, every leave is showing the same thing. and being three weeks from harvest, i am afraid of loosing alot of the final growth and denseness.
plants are in soil.
and i ph the water at 6.5 every watering. I nute, water, water nute. and so on. although, i haven't re calibrated my ph meter in a month or so. i might be giving them inaccurate ph water.

just a little bump. on the hunt for some answers. thanks.

lets try one more time, anyone?

bump for good measure.

well, to start off your working with a really notoriously tricky strain to begin with so congrats so far.

Whats the ppm of your run off?

Also, look into the nutrients that you have been using. Are they high in salt content?

View attachment 1293921

My plants kind of look the same as your (in hydro tho). People have said its nute burn. But if you have been using your nutes at consistent levels through out flower and are only getting this now, like I said, good chance its salt build up.

Briester Behemoth said:

Also, look into the nutrients that you have been using. Are they high in salt content?

View attachment 1293921

My plants kind of look the same as your (in hydro tho). People have said its nute burn. But if you have been using your nutes at consistent levels through out flower and are only getting this now, like I said, good chance its salt build up.

Click to expand...

so if its salt build up, that should i flush really good a few times and then start over? although im only a few days away from starting my flush, so i guess i could flush them really good when i begin my flush, and than hope they turn out ok threw the final two weeks? i guess i answered my own question, but i just couldnt figure out what has been going on with my plants. i know plants begin to loose color in their leaves and fall off. but thats usually a gradual leaf color change, no burning symptoms. i may be ok because i am so close to harvest, i just thought i might try to learn something to prevent it from happening again. i figure any abnormal behavior only hits hardest in the yield, so anything i can do to make it better next go around is worth big.