Can't figure out what this is

[DLL333]

Some kind of deficiency? I've seen it on a couple leaves at the top of one of my plants.

 

[Backlipslide]

Is that on newer growth, or older growth?

 

[DLL333]

Looks to be on newer growth. Its only at the top.

 

[Backlipslide]

Looks like it’s a good candidate to a calcium deficiency.

 

[Backlipslide]

A calcium deficiency can sometimes be difficult to diagnose since calcium deficiencies are often accompanied by magnesium, iron, and/or other def.