Can anyone tell my what is causing this issue?

I am 3 weeks into flowering some purple kush. I am getting tons of yellowing, some smaller leaves on the bottom almost appear to be white in color and can be pulled off with almost no force!

I am running Cutting Edge Solutions..100% Nutes

Also added thier Mag Amp, Plant Amp, and Uncle Johns Blend.

Rockwool Slabs (Cut into blocks when i hated that i couldnt move them)
ph - 5.5
Res Temp 68
RO Water
Room Temp 73
Under Light Temp 81
1000W Lights 2 feet above
Hand watering drain to waiste

also i am getitng some leave tips drying out and getting crispy??

any advise?

Thanks!

this has happened to me before.
i knew what the culprit was for mine right away.
my intake fan wasnt sucking in air from the outside because the ducting fell off the fan.
5 days into puttin it back on they were back to normal.
how is your airflow?


it kinda looks a little nute burnt. whats your ppm at?
it also looks like a deficiency in nitrogen.

you can prune any of the leaves that look like they wont make it.

Your Ph Should be be higher than that. Too much acid maybe. I try to keep mine at around 6.5

Rusty Crutch said:

Your Ph Should be be higher than that. Too much acid maybe. I try to keep mine at around 6.5

Click to expand...

6.5 is for soil.

for hydro applications a lower ph is optimal

me personally, i keep mine at 5.8 5.9

ImTheFireMan said:

this has happened to me before.
i knew what the culprit was for mine right away.
my intake fan wasnt sucking in air from the outside because the ducting fell off the fan.
5 days into puttin it back on they were back to normal.
how is your airflow?


it kinda looks a little nute burnt. whats your ppm at?
it also looks like a deficiency in nitrogen.

you can prune any of the leaves that look like they wont make it.

Click to expand...

you just might have it..i added a fan speed adjuster for the can fan in the room that normally sucked fresh air into the room from the house...but this time i sealed off the door 90% and i might be robbing the plants of fresh air...

classic pictures of severe nute burn. flush and hope it recovers

wallimaster said:

classic pictures of severe nute burn. flush and hope it recovers

Click to expand...

the nute burn doesnt look as severe as the nitrogen deficiency.

i would just maybe cut down on the nutes to about 400ppm until they recover. then slowly work your way back up

ImTheFireMan said:

6.5 is for soil.

for hydro applications a lower ph is optimal

me personally, i keep mine at 5.8 5.9

Click to expand...

i think im going to have to agree and change my ph to 5.8 here forward.

added some nitrogen today, lets see if they like it! Thanks

I dont think its nute burn tho...ive been sticking by the cutting edge solutions online nutrient calcalator and never exceed those levels

Its just nitrogen dificiency. Nothing to worry about i get it all the time in budding. You can go out and buy some extra nitrogen and feed it to them not necessary in my eyes tho.

I agree, they are really lacking nitrogen. I'm guessing that you switched to bloom nutes already? I used to have that problem too, until i started running veg nutes til about week 3-4 of bloom, them switching to bloom nutes. Now, they stay nice and green.

update:

I went out and picked up some "Dark Energy" today NPK 2-0-0...Using it as a folier spray to try and give em a nitrogen boost. Sprayed 16 plants just now...I will wait a few days and see...

Im thining of spraying another 16 with Cutting Edge Solutions "Folier Spray Mix" (2.5ml/g of grow, 10ml/g plant amp, 2.5ml/g mag amp) and see how those respond...

I am leaving another set of 16 unsprayed and continue using the adjusted nutrient mix i made for all the plants a few days ago to ensure diversity in my tests and not to kill all the plants if the folier spray experiemt goes bad..lol

I just sprayed them, the lights are off...I will update yall asap