What's wrong with my plant? Leaves look weird

[Glennorlan]

I looked at my plant this morning and the new leaves and even some old ones look lighter or yellower. Is this a deficiency or an abundance of some kind? Please help!

 

[NuttyProfessor]

i would say Iron Deficiency, could be wrong , but it looks very like it ...Too much Phosphorus can lock up iron

 

[ray2014]

Greetings. I would appreciate it if someone can walk me through on how to post my pictures.

 

[blackhole]

Photo Gallery Guide: How to Resize, Upload & Post Photos

 

[Kola320]

Are you in flower ? stretching can look new lighter green