Super Lemon Haze young beauty needs your help?

Couple issues here:

1. New leaves considerably lighter, more so than normally. Their lighter color isn't even; the outer fringes are darker like the lower, surrounding leaves. Is this the early stages of a deficiency or other problem?


2. A few leaves at the bottom are yellowing. I believe this to be because of poor light penetration from the 100w daylight CFL I'm using, which makes photosynthesis at the bottom of this 14" 4-cola plant way less efficient, and therefore, the leaves are expendable. I'm taking clones from down there and would remove any of the remaining bottom 6" or so for airflow anyway. I'm not super worried about this because she'll be under a 600w MH soon, but figured it's worth seeing if anyone had other ideas:

i think it got a little N deficient at one point. but it looks like its been fertilized recently

thats not an n deficiency or at least its not just an n deficiency but rather a micronutrient deficiency , watch out the ph or be sure the fert u use has it all

bonjo78 said:

thats not an n deficiency or at least its not just an n deficiency but rather a micronutrient deficiency , watch out the ph or be sure the fert u use has it all

Click to expand...

Which micronutrient(s), specifically?

This plant is getting 1TBS Fox Farm Big Bloom, 1Tsp Grow Big (half-strength compared to their chart) with every watering, all nutes pHed to 6.0-6.5

Here's a look a little less than 36 hours later:



Based on what I can tell from ...Garden Saver, this appears to be the start of an Iron deficiency? Probably because of pH? (maybe not waiting long enough for reagent to process...gotta get a combo meter damnit!)

infrared said:

Based on what I can tell from ...Garden Saver, this appears to be the start of an Iron deficiency? Probably because of pH? (maybe not waiting long enough for reagent to process...gotta get a combo meter damnit!)

Click to expand...

So I got the Hanna 98129, and it does indeed appear that I should have been waiting longer for my reagent drops to work their magic. Solutions that show as 6.0 (yellow) within the first 15-20 seconds appears closer to 7.0 (green) after a few minutes, and my combo meter confirms that I have likely been feeding these way too high a pH (perhaps even as high as 7.5!), which could account for the Fe deficiency.

I'm going to flush them with 6.3 water and hopefully things will get back on track.