Is this phosphorus def ???

hi guys i ve got this passion#1 into the 2 week of flowering (last day) .

Some of the bottom leaves have been withering since few days ago....
The growth still look good though...any ideas?

250w hps w
ph 6,5-7
Biobizz soil and nutrients
temp around 85°

this is my 1st grow , i swear i do not overwater them

the residual in the pot is just garden lime


the first pic is the room , ive got 3 plants . arent they too crammed?

nutes amount : 2 ml biogrow , 3 ml biobloom , 4 ml bioheaven , 1,5 ml algamic, 1,5 ml topmax

not sure mate as im new to growing too
but try use this chart https://www.rollitup.org/blogs/blog28506-plant-problems.html see if it helps
sorry i couldnt be more helpful maybe someone more experience can point you in right direction
peace from uk budswah

i dont think its a def.. maybe to much...

maybe this will help

http://www.growweedeasy.com/marijuana-symptoms

Look at the schedule and use this as a guide, you should have got one with the product.

quit biobloom, increase biogrow to 5 ml and get some camg supplement, you got n def and if u wont increase ur n, u will have a lot of falling leaves and shitty yield. keep leaves green, good luck

edit: i had the same leaves and problems on my previous thread, read through my slh & c99 grow from sig, ull find a lot of usefull shee in there

high p foods can give u a lot of problems http://www.totalgro.com/concepts.htm
it causes n ca mg lockout, indoors p def is too rare 4 u 2 have it. also bare in mind that after flip plants experience very fast growth for first 4 weeks, therefore u will need lots of n and ca and mg.

Those hooked, whitish leaf tips are a sign of calcium def. I see tons of ca def during flower. Calcium is necessary in maintaining soil pH as well. pH adjusted water is not the way to correct soil pH. You need calcium.

That lime should help but youre going to have to get it into the soil. Top dress, spread it around evenly with your fingers and water.

If you have soft water or use RO, you should be adding cal mag first, then nutrients. This will prevent big swings in pH when nutrients are added. But this is separate from adjusting soil pH.