Leaves are going yellow.. 2 weeks old.. Lack of nitro?

Hey guys!

Here is some other pics taken during daylight.. Think it´s easier to see now..

PH = 5.5-6.0 & EC 0.5-0.6

Have you given nuts?

That is not a nitrogen problem... That is a magnesium deficiency...

Just add a nute mix with magnesium in it ... Or add some epson salt. will sort it in no time

Agreed ^^^. Don't switch to your flowering fert till after the stretch, if you didn't know.

Yup. Magnesium deficiency. Epsom salts will fix you up.

i have the same issue in mine, and mine are relatively same age, the water out here where i am is very soft, so i added a teaspoon for every 4 liters of water

The ph isnt 5.8 and now you def. Get a digital calibrated ph pen and fix it.