I've been having a issue with my personal grow & I was wondering if you can help me figure out

A customer has a question and I hope we can get some opinions on it, thanks.

I’ve been having a issue with my personal grow & I was wondering if you can help me figure out what I’m doing wrong ! I’ve tried a few different strains but still get the same results, airy loose non dense buds . I’ve tried 2 plants of lemon og , og kush , & ko kush each time , that’s 12 times of trying but still same result .
I have a 4 w × 4 l x 6 h room that was hand built with 2 x 4’s with 2 " insulation sheet panels & white plastic walls , ceilings , & floors for my personal room . I use a 400 watt mh & hps for my veg & flower cycle with a 200 cfm exhaust fan & filter that has plenty of air flow ! The room at night stays around 68 - 70 & day time between 73 - 75 , I use 2 sometime 3 exhale co 2 bags , With a swivel fan to blow on plants every 15 - 20 minutes !

                       I've tried each strain twice with rx green solutions full line of ferts the with each strain i fed in veg 1 time a week & flower 1 time a week with a ph of 6.3 - 6.5 with every feeding & the ppm  recommended by company with the light 14 - 16 inches above the plants but got big airy buds that smelled like straw ! Thru this process of each strain I was reading & doing research trying to figure out what I was doing wrong ! 
                        So bought a book called Marijuana Grow Basics by Jorge Cervantes & read it , so I got to thinking that it might be the ferts , so i switched to fox farms whole line of ferts i fed 1 time a week in veg & up to 2 times a week in flower keeping soil evenly moist not over watered , basically followed step by step from what the book says each week  with the light at 14 - 16 " over  2 plants each time ph at 6.3 - 6.5 & ppm at recommended ppm by company but still same result ! The seeds I have bought cost $ 55 for 5 of each strain plus $ 7.00 shipping from a seed bank ! 
                         And I'm at the point I don't know what to do other than give up because I've spent alot of $  .  I mean the plants have always looked beautiful,  green , lush & full with no nutrient burn or light burn all the way thru the cycle , I just can't get them to produce full thick / dense buds properly & was wondering if you could give me some advice or notice anything out of the ordinary that I may be doing wrong , I would greatly appreciate it  !
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Sounds like you need more light to cover the area vetter and give more intense light.


To get the nice dense buds you will need a good light. I use 600w plus you will need to change your build from HPS to MH for flower.

Actually it’s reverse of that sorry. I’m always messing that up. So MH fir veg and HPS for flower


You need approximately 50 watts of power per square foot of space with HPS/MH lighting. So for your 4 x 4 you have 16 square feet. Times that by 50 and you get 800. So you need 800 watts of power to fill that space. If you bought another light like the one you have then you will have enough light to fill that space.

And then make sure you have your lights at the closes distance possible during flower.

This should dramatically increase you bud size and density.

I hope this helps :sunglasses:


All solid advice

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