Need some help determing whether or not this is a nitrogen deficiency, which i figure it is but would like a second opinion and some good advice as this is my first grow. Appreciate any help at all.
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Lights: 23w 2300k and 43w 6000k compact Flourescants
Started with 18/6, just switched to 24/0. Light is within 1 inch from plants.
PH: Don't know but have been using cold water from tap that has been sitting out for at least 3 days. (Don't have meter or ph strips)
Watering/Feeding Cycle: Water everytime fully until water drains and then a bit and don't water again until soil is completely dry and pot feels very light, and Feed with nutrients thru foliar feeding and into soil every 3 days.
Fertilizer: Started just water, then was using 10-56-10 plant prod for rooting and seedling stage, just switched to 20-20-20 plant prod. 1/5th of recommended strength diluted into water.
Temp: 70-85 degrees DAY / 60-70 Night
Humidity: 30-60%
Soil: Loamy Potting Soil with good moisture retention, however, not alot of soil in the very small pots, i feel that the one with the yellow leaves does not have enough soil and space below the surface for the roots.
Grow Room: Box in my closet with Fan.
PLS HELP
THANKS

Guess what? Im gonna help you.
Lights: Keep your cfl's within 1-2 inches of plants, close as you can but don't burn them. Add some more cfl'
s if possible.
PH: You HAVE to find out what your ph is at. Go buy a little tester kit at the hydroponic store or ask around at a pool selling or hottub place for a testing kit, they are cheap. In soil you want to feed at 6.8- 7.0 veg, and 6.5 - 6.3 for flowering roughly.
Water/feeding cycle: Stop the foliar feeding for now and just concentrate on keeping the soil moist and not drying out completely. It traps roots in dry pockets, not good. It's best in soil to just water on a consistent cycle with nutes every 2nd feeding. Example: I give 3 gallon pots, 3 foot plants 2 litres every 2 days each. Give them a decent flush every 3 weeks or so.
Fertilizer: all I'm gonna say is do some researching and find out what you need to use for different stages of growth. That 20-20-20 = not good, at all. Start again with all your nutrient plans. I would go with some real nice organic stuff from the hydro store. Trust me man.
Temp: the cannabis plant does the best with very consistent temperatures. Perfect being around 78 degrees or so usually. You want a drop of around 15 degrees max at dark time. So say 80 degrees lit to 66 at dark. Perfect. You dont want your temps all over the place, keep them the same for light and dark throughout the grow period. Some like to make it real cold at the end of flowering but thats getting a little more technical.
humidity: seems okay, you will live at least
Grow room: to grow cannabis successfully your going to need air exchange. This means new, fresh air coming in with older stale air going out at timed intervals or all the time. I keep my exhaust and intake running 24/7. To do this setup all you need is an exhaust fan, inline preferably, and some ducting to run it. You are also going to need some ducting to run your passive intake, if you can get it to the outside world, that's the best, fresh cool air. The exhaust fan will put negative pressure on the room therefore sucking in new air through the passive intake. More fresh air, more co2, equalling better growth and virility.
Good luck hope this helped ya get a better start. BTW all the stuff I told you/advised you to do will cost under 250 bux if not cheaper, it'll be worth it to do this properly, trust me on that one. You could always do some reading up, there's tons of info out there
~ BCbuddy
