Yelloowing leaves. Nitrogen defficiency most likely... Please help?

Hey guys, i have this nice autoflower going, and the leaves are turning very yellow. I'm getting kinda worried... I'm guessing that it's a nitrogen deficiency, but i just wanted you guys to confirm. Every time i water (3 - 5 days), i add some BIOBIZZ bloom, along with more than the recommended amount of ph down (Because my PH stays ridiculously alkaline).
Please tell me what's wrong And what i should do.

Here's my nutes: http://www.greenshorticulture.co.uk/categories/Organics/Bio%2dBizz-Nutrients-&-Additives/BioBizz-Bio%2dBloom/


Please help me
Thanks a lot guys - boom

Without biobizz grow you will always be deficient, the bloom is one part of a two part fertilizer system, your plants aint getting what they need. Biobizz ask you nicely to use the grow with the bloom for all stages of flowering and you just stuck your fingers up at them but your plant just stuck its fingers up at you Of course there will be those that think you can get away with just the bloom but take it from me its not advisable. Cool!

BeefSteak said:

Without biobizz grow you will always be deficient, the bloom is one part of a two part fertilizer system, your plants aint getting what they need. Biobizz ask you nicely to use the grow with the bloom for all stages of flowering and you just stuck your fingers up at them but your plant just stuck its fingers up at you Of course there will be those that think you can get away with just the bloom but take it from me its not advisable. Cool!

Click to expand...

It recommends 2 - 4 ml per watering for both grow and flower, so how would i mix it this time? would i do 2 bloom, and 2 grow?

I merely go off what my plants tell me so charts and stuff like that are useless but to be honest ive used it for years so is easy for me to accomplish. I really just wanted to say that the bloom needs to be added on top of the grow for the flowering period, seems like you were just using the bloom. Good luck

have you tested the ph of the run off what is it? if its loww add some lime you will have no problems! if you added nutes and this still accrued its a ph problem and or salt build up.

thats N deficiency for sure. i reccomend you stop using ph ups and down so much, and instead when you want the ph to go down simply add more fertalizer.

bio bizz bloom = 2-6-3.5

*even if you feed 3x the amount of bio bizz you will only get 6-18-11.5 which isnt enough. you need to get your Nitrogen up to the 5 to 10 area. your gonna have to buy some all purpose plant food and make your own recipe, just make sure to figure out the npk. for flowering i would keep the N below 10, and the P and K above 10, prefferebly the P and K should be double the value of N.