Pleas help!! My plant is dying.

Hello everyone im a new guy here .Im growing my second time and have problems with my plants.

More info:
Bulb :400 W HPS on 1.44 m2
stage of plant:start of flowering 2 weeks
Cross: 6x Super silver Haze from GHS , 3x White window x big bud from female seeds
Pot :11 liters
Humidity:40 %
temperature - 28-29 celsius
Ph=6.0-6,5
Soil - Canna terra pro, clay balls
Nutrients- for flower i got hesi bloom complex and canna boost ,hesi phosphorus plus,canna rizothronic,molasses

So the problem is the yellowing leaves from bottom to up, they dropping off .i dont know whats wrong im watering them every 2-3 days .ph is good for sure .i tested EC run off water its from 1.0 to 1.4.water that i used is 0.3 Ec with out nutes. I was flushing them recently with canna flush 5ml per 5 liters and then i used half strength of nutes cuz i was thinking about deficiencies.the yellowing starts from late veg period and they are lost some leaves but now is going up and up im worried that i dont finish flowering .sorry for my english its not good .those are pic of plants.thank you for any help im answer more questions if needed.

it looks like either nitrogen is being locked out by salinity or ph is off, or you are not feeding it enough! now is the most important time to watch your plant and correct quickly as possible. let the flowering begin! good luck

You have to feed your plant nitrogen through the second week of flower. Thats an N deficiency.

How i give them nitrogen they are in flower.Can i used organic nitrogen?but its slower, or give them Hesi bloom complex NPK its 3-2-3 ? what do you think will be better and what dosage mayby increas to 2x strength?

I use 6-4-4. Don't over nute them.

Like they said ,, its nitrogen deficiency ..

Visit one of the stickys for details about nitrogen deficiency