What's wrong?

I'm no expert, but it sure looks like the nitrogen deficiency shown on this site.

http://www.bihydro.com/calc-deficiencies.php

It's a pretty good little module that shows pictures for common nutrient deficiencies.

Looks like nite burn to me..

"N" def and Cal/Mag def, not nute burn.How far along is your plant??? Flowering?? What did you feed it last???

yea agreed with bekindbud,

Nitrogen deficiency. but theres things that we gotta know to be 100%, flowering/veg state? when did you feed it last? dirt/hydro? whats the entire plant look like? are there other leaves with 3 fingers like that? the size of those, id guess and say they are a lil deformed/mutated. whats the pH? whats the soil like? temps?


I mean you cant post 1 pic of 1 leaf and expect us to answer your "whats wrong" we need info!