most leafs turn yellow

thank you all! now im trying flush my plants with tap water in: 7l 300ppm ph 6.7 out: 500ml 200ppm ph 6.8 does that mean its not an overdose?

Hola. Para mi punto de vista no falta nitrogeno. Tienes un bloqueo de nutrientes por una sobrefertilizacion. Las hojas de abajo estan quemadas por el exeso de nutrientes. Has un lavado de raises para eliminar un poco del exeso. Suerte

Lack of nitrogen from lock out probably .plants should be green till the end .why people think its normal to have yellow leaves thats bullshit it means you have a problem

I'm with gottagrowsometime on this one... I think he's nailed it.

And 1 more thing. Maybe you should remove some of the fan leafs. Making sure to leave the 2 top fan leafs on top of each node .this will stop the energy been used to make nice big leafs into producing a better quality of end product. That girl does need to be opened up some though pal.. Good luck

Hey pal. So what I can see this is the results from overfeeding..as I can see that in the lowest sets of fan leafs that were rusted by N tox and excess heat I reckon. As far as I know..the pro line..needs no additional nutrients. Them A+B is everything you need in soil growing. With the others you are getting locked out.. pull back on everything f Expect the bro stuff..I think its powder right? So all you need to do is top dress your sub and let the whole line In A+B more than you'd find in any of the old line.

dalla foto del diario si vedono le foglie all'ombra diventare gialle se è solo questo è la pianta che trasferisce i nutrimenti mobili alla parte piu importante, le cime puoi tranquillamente toglierle e vedere se anche le foglie nuove diventano gialle ma non penso..cmq questo consiglio è valido solo se le foglie gialle sono come quelle della foto se sono di piu una foto piu dettagliata aiuterebbe

Completely normal that far into flower, the plant is just sucking up all the nutrients left from the leaves and using them for their final push to the end, nothing to worry about , you're doing fine...Nice grow