New Growth frail and thin

thin new growth with chlorisis... Too much P or K has these symptoms. Often, nute brands tell us to overdose p and k, so it's a good chance. if it fills in fast, it's a small issue, but something you most definitely can prevent.

P.S. - start a diary, the more info you provide, the better the answers will be.

Plant looks fine to me........often as a plant reaches or gets close to sexual maturity, the leaves can change frow thick and broad to long and thin naturally. I have no evidence of why, but my theory is the leaves get thinner towards flowering so that pollination is enhanced by the flowers being more open rather than being hidden by fat leaves. I have seen this change in leaf structure many, many time, especially with hybrids containing a lot of sativa genes......they often veg with indica type leaves, then change to sativa type leaves once flowering gets close. Anyhow, your plant looks nice and healthy, I would not worry too much at all. Also, once the leaves start gettingh 9-11 fingers on them, space limitations will cause small leaves to sprout, before opening up and growing into normal type/size leaves. BTW, neem being an insecticide won't really help in any way with leaf size/shape........nor is it a lightig issue.

Hey, I'm not sure what is happening, but it makes me think you have a nutrient lockout. Your pH might be off and stopping your plant uptaking food. Looks a little like iron deficiency, but there is more than just that going on. If you are in soil, humic acid works well to neutralise the pH. Compost has a lot of humic acid in, so you can even top dress with compost and water it in.