GH WW yellowing wierdly 12/12 from seeds

[Googlebot]

Indoors
Medium: 5.5l plagron bat mix
Watering: RO water
Light: 250W CMH
Age: 25days (12/12 from seeds)
Temperature: 30°C

they started flowering 6 days ago. It looks like a ph issue cos this soil shouldnt be fed with anything until 6th week.

Pictures:

The girls


WW #1 (bottom right)


WW #2 (top left)


Blue cheese (top right) * looks healthy


Power Plant (bottom left) * she needs to grow

 

[0calli]

the botrtom yellow ones are normal they will die off but looks like an N defficency to me

 

[0calli]

here check this chart helped me a lot
View attachment 1983310

 

[Googlebot]

im just not sure if its a good idea to give her nutes in this hot soil. I couldn't check the ph of the water till day 24th so is it possible that a ph issue caused this N deficiency?

 

[0calli]

90% of the time my yellowing happend cause of ph u know the optimal ph for soil ?

 

[Googlebot]

2 days ago i bought my new ph meter and adjusted the water to ph 6.5 so crossing fingers

 

[0calli]

6.5 is just fine but 6.8 is optimal for soil growth but it can also depend on your soil ph any way you know that ??????

 

[Googlebot]

6.5 is just fine but 6.8 is optimal for soil growth but it can also depend on your soil ph any way you know that ??????

[FONT=Arial, Helvetica, sans-serif]Ive just found it on a growshop's website and they say, [/FONT]pH: 5,8 and 6,2
In this case its possible that the ph dropped down below the suggested rates cos i watered them only with RO water and it doesn't affect soil ph much. Today I will check the ph of the soil.

So you say the best if i adjust the ph to 6.8 before every watering?

 

[0calli]

5.8 to 6.2 is for hydro alot of site dont mention that and ive seen crops get bad results cause of it trust me 6.5 to 6.8 is what ya want in soil

and adjust to 6.8 do your nutes if you are then take another reading of your ph see howmuch it flucuates