Yellow leaves 2 weeks into flowering???

hello everybody,this is my first post and first grow,i currently have two plants both about 6ft tall and are looking good,one is northern lights and one is big bud and im just over 2 weeks into flowering period,my problem is i was wondering if its normal for quite a few of the leaves to start to turn a bit yellow and start to fall off,apart from this im very pleased with results ive got so far??

if its the bottom thats normal. Or you may have Nitrogen deficiency.

What nutes? whats your pH?

yeah it does seem to be at the bottom of the plants,dont have a ph tester yet(its next on the shopping list) and im using green haze feed with hydroponics "buddy" booster,im also gonna have to look into a dehumidifier as its sitting at around 75% but temps bang at around 24-25,do u think ithis will affect yield/quality much??

i grew mine in 75% Humidity. i dont know celcius but my temps are 75-80F

Id buy a dehumidifier before ph tester. i dont know about those nutes. whats the numbers?

had a quick look at bottles but on the 2 part bloom feed there is no numbers but on the bud booster it says npk 0/3.6/6,do you know roughly what id be likely to pay for a dehumidifier?

Im going to assume your not from the US. So here a cheap one 50$ a good one 150-200$

Yeah your nutes is 0 in the nitrogen area. Find your nutes you can mix with your flowering nutes thats high in N

I use fox farm grow big which is like .3 for n. Then id use tiger bloom which is like 3 i think. So yeah

A decent dehumidifier is gonna cost you around 200 bucks. You should continue your veg food for about the first 2 weeks into flowering. They still suck up alot of nitrogen during this stage. But I would advise getting a ph tester first, if your ph is messed up it could cause a lockout.

are you sure thats correct about using your veg feed 2 weeks into flowering,im not experienced enough to argue the point but i done loads of research before i started and didnt read this info anywhere but if anybody else can confirm this il bear it in mind. ta