Yellow trouble

[Cheeks82]

Hello, I'm into my 2nd ever auto grow and still have a lot to learn and this one I'm not sure about. As you can see by the picture the new leaf growth starts yellow, any ideas??? I believe it might be nute burn or lock out. The plants are now in preflower with the 1st pistols showing this week

 

[Vulx]

Check this out first so that we can help more easily.

^that's a link in case it's hard to tell

 

[Vulx]

More photos wouldn't hurt either. Of the whole plant so we can compare new and old growth - the way that symptoms show up on each says a lot about the issue.

 

[Cheeks82]

More photos wouldn't hurt either. Of the whole plant so we can compare new and old growth - the way that symptoms show up on each says a lot about the issue.

More photos wouldn't hurt either. Of the whole plant so we can compare new and old growth - the way that symptoms show up on each says a lot about the issue.

These are what I have on my phone for now I will take some more pictures tomorrow