My 1st Grow

Day 50 From seed for plants 1-3, Day 42 for plant 4. Update from last week, whatever that deficiency was, dropping the PH fixed it. There is still a little yellowish tinge on some of the leafs of plant 2, but overall it has improved a lot, and the dark spots stopped spreading immediately after the feed. I was going off the assumption i should be at 6.4 - 6.7, but maybe that should be lower because its soil-less with salt based nutrients, 5.8-6.3. Going to stick to the lower ph ranges and try to fluctuate every feed. Girls are packing on buds fast, and starting to smell fruity. Out of the 3 plants, the 4th one that was started a little more than a week late has a very different structure than the rest. Around week 3 - 4, I was curious why the first 3 had such a close inter nodal distance. I know stretch can sometimes indicate not enough light, but after looking at some other sour crack photos, I felt the light being so close was causing the small bushiness. So, while the 4th plant was right in the middle of its big growth phase I pulled the light up a foot and a half. As you can see from the first picture, the result is the plant is now double the height of the others, however, no where near as dense. I'm not sure what structure is more preferred here, but the small dense plants were hard to manipulate, so I guess I'll just have to compare yields at the end.