Problem with leaves yellowing a little bit

So I’m having a problem with leaves yellowing a little bit I could some help!
Strain; og kush
pro soil in pots

System type?

PH of runoff 6.5

What is strength of nutrient mix 1/4 manufactures recomendation
age old grow,calmax,bone meal.

Light system, size 400wat hps

Temps; Day75 Night70

Humidity; Day, Night 45% rh

Ventilation system; Yes
AC, Humidifier
Co2; No

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What stage are they in? At mid- flower the bigger leaves do turn yellow so need to know how old plants are

PH is a little high if your not flowering maybe it needs a little nitrogen

the plants are in week 4 of veg.

I’m a little gun shy of giving them more nutes because I see nute burn tips (very little)

I would flush with just water at 6.3-6.5 PH for a few rounds. See if that helps the problem. Most likely you just have nitrogen locked out slightly. The straight water should help that issue. Once things have calmed down with the yellowing go back to feeding.

you can go even a little lower on the PH 5 to 6.5 is good start using as much N and use more P and a little more K if starting to flower .

I ment less N

I need to see a pic and as @Phil61 stated what stage are they in cause it all speculation with this info.


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