Thanks! I just checked out your LED pics! They look great! I'd like to switch over to LED's for my next grow.... Picking out lights though is pretty hard and confusing..... how much did you pay for your setup and which ones did you go with if you don't mind me asking? I feel like you could really break the bank with those things but in my situation any way to avoid the heat on my girls is worth it.
As yellow leaves on lower growth can be a sign of nitrogen deficiency from either too little nitrogen nutrients or too low PH preventing nitrogen uptake, yellow leaves on newer growth can be a sign of iron deficiency from either too little iron nutrient, or (more often) too high PH preventing iron uptake.
Yes. I test PH and ppm at all times and test run off as well. I try to keep my PH fluctuating between 6 and 6.5. The new yellow growth has gone back to the healthy green I'm used to. I'm pretty sure now that it was just a sign of light deprivation.
Start of Week 3. Plants went back to HPS lights at 600W. Started lollipopping to keep these leafy bastards clean. Getting some great edibles off this thing already. Pics are bad with this crappy lighting... sry.
Bought a portable AC unit and have my room running at a perfect 70 degrees. Pretty happy with my girls so far. Filling out the room quick. Exactly 1 month into flower, 6 more weeks to go.