Help mag or nitrogen deficiency?

Jserna444

Jserna444

Active Member
Hey guys got another question for you vets. So it started slow and has progressed a lot. So leaves on my afghan kush towards the bottom started fading almost losing their green color and fading yellow. Its all over the bottom of the plant. It started happening when i switched to ro water. With the ro water i first add calmag and ppm up to around 200 then i add my nutes. I dont have any ph up so ive been bringing it up with silica, which i know is a no no in flower but its all i had im ordering ph up today. But the hellow fading has gotten bad and the leaves are dying. If you guys could lend your eyes out to me amd see what yall think. Its also happening very slow on another one i just put in flower.

Little info.
Afghan kush strain
Water ph'd to 6.5
FF trio
AN Big Bud
400w hps
RH 33%
Temps stay around 78-80
12/12
Any more info needed just lmk20201023_080157.jpg20201023_080209.jpg20201023_080145.jpg20201023_080217.jpg
 
getogrow

getogrow

Well-Known Member
Shes lacking nitrogen. I do not know if its a lack of food on your part or the medium is locking the N out.
How much of each of the trio are you using ?

Forget about bringing the ph up .....its a waste of time. RO water is lacking lots of micro nutes. Maybe the lack of one of the micros is inhibiting the N from getting to the plant. Im not sure why shes not getting enough N but i would go ahead and add grow big.....2 or 3 doses of 2tsp/gal with no other food except maybe big bloom and she will come right out of it. (assuming your not over watering)

soil :joint:
 
Jserna444

Jserna444

Active Member
Ok thanks man ive been giving half strength tiger bloom and big bloom every other water. I also forgot to mention i watered in great white mycos a few weeks ago but i did it to all my plants and they seem fine. Its probably the half strength doing it huh? Also im new to ro so am i understanding that after i add my calmag and nutes and heck the ph and its down to 5 something just go ahead and water? I understand ph is really hard with ro but yea should i just go ahead and water with that?
 
S

stashpot

Member
needs more PK the plant is small going into flower.. so the preflowers are eating all your nutes... double the feeding. Sometimes P deficiency can look like a N deficiency.
Also you're going to be lacking chlorophyll production because you RO your water, make sure to feed it reg water once a week to keep it in check.
 
S

stashpot

Member
raise RH to 50 -55
check your buds they look hermie
add chlorophyll water once a week
bump feeding up double.. not nitrogen use bloom or whatever you use for flower.
ph 6.5-7.0
 
Jserna444

Jserna444

Active Member
Im confused. Ive been giving her half strength nutes and it makes the ph around 5.4 or something. So if your saying that im using to much if im getting ph at 5 something then how can i double it?
 
S

stashpot

Member
Jserna444 said:
The stuff youre seeing is probably from the coco water foliar i did early on flower
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yeah make sure to keep an eye on it and make sure its not because it will eat that plant alive in days.

anyway in my opinion its a lack of Chlorophyll production due to RO water.
That and not enough P and K.

i never said 5ph it was the other guy.

ph always at 6.5 - 7.0 always ph the water before you add the feed. dont ph after adding feed.
 
Jserna444

Jserna444

Active Member
So go with nitrogen or flower nutes?
stashpot said:
yeah make sure to keep an eye on it and make sure its not because it will eat that plant alive in days.

anyway in my opinion its a lack of Chlorophyll production due to RO water.
That and not enough P and K.

i never said 5ph it was the other guy.

ph always at 6.5 - 7.0 always ph the water before you add the feed. dont ph after adding feed.
Click to expand...
Ok that actually helps a lot tjank you man i used to ph after and here recently ive been adding calmag to 200 ppm then add a little silica to bring it up amd let the nutes bring it back to where it needs to be. Im getting away from silica during flower ph up be here tomorrow
 
S

stashpot

Member
Jserna444 said:
Im confused. Ive been giving her half strength nutes and it makes the ph around 5.4 or something. So if your saying that im using to much if im getting ph at 5 something then how can i double it?
Click to expand...
Jserna444 said:
So go with nitrogen or flower nutes?

Ok that actually helps a lot tjank you man i used to ph after and here recently ive been adding calmag to 200 ppm then add a little silica to bring it up amd let the nutes bring it back to where it needs to be. Im getting away from silica during flower ph up be here tomorrow
Click to expand...
yeah your making it hard for yourself man

First ph the water to 6.5-7. thats done now adding any type of feed will keep it the same PH. normally flower and veg nutes are P.H at 7.

Now we have perfect ph water then i add flower nutes and some veg nutes, keep using both.

Normally when i flip my plants into flower i hold off on the VEG nutes for 2 weeks then give it to them again with the flower nutes!

So for first 2 weeks of flower i add 2ml flower nutes per Liter of water.
then after 2 weeks flowering i add 3-4ml of flower nutes and 1ml of VEG nutes till week 5-6.

Never stop feeding veg nutes until the last 3 weeks man.
also forget PPM let the plant tell you what it needs.. you'll find a sweet spot for her and you give that everytime.

P.S if i was you i would use regular water its packed with micro and macro nutes.. maybe use half ro water and half regular it will be better for 1 plant
 
S

stashpot

Member
also with 33 RH your transpiration rates are in danger which means the plant can't photosynthesis or produce enough chlorophyll to keep the nitrogen rich leaves green. bump it to 45 at least.
 
Trickyticky

Trickyticky

Well-Known Member
Jserna444 said:
Hey guys got another question for you vets. So it started slow and has progressed a lot. So leaves on my afghan kush towards the bottom started fading almost losing their green color and fading yellow. Its all over the bottom of the plant. It started happening when i switched to ro water. With the ro water i first add calmag and ppm up to around 200 then i add my nutes. I dont have any ph up so ive been bringing it up with silica, which i know is a no no in flower but its all i had im ordering ph up today. But the hellow fading has gotten bad and the leaves are dying. If you guys could lend your eyes out to me amd see what yall think. Its also happening very slow on another one i just put in flower.

Little info.
Afghan kush strain
Water ph'd to 6.5
FF trio
AN Big Bud
400w hps
RH 33%
Temps stay around 78-80
12/12
Any more info needed just lmkView attachment 4722705View attachment 4722707View attachment 4722710View attachment 4722712
Click to expand...
Give it a boost with some seaweed ,
The nitrogen is being sucked out , ya need to replace it ,
 
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