@kenneth nuorala
OK, first off.
2 pics of 1 leaf leaves far too many questions to give a quality answer!
Then you give us a whole area shot and that is getting helpful but, still leaves us with the still needed answers to the basic questions you have not supplied.
I am not scolding you here ok? You just didn't understand right?
Many of us with advanced years and abilities get tired of asking for the basic things we need to know to help.
The sticky posts and the introduction to new members area GIVES you the answers on how to post these questions so we CAN answer properly......
With that out of the way.
Where on the plant did the leaf come from? It would have been much better to have taken it (pic of the leaf) ON the plant. Then a pic of the whole plant.
What soil (I see it appears to be soil)?
Did you amend the soil with anything? - list it!
What do you use for feeding? - List EVERYTHING you use!
What is your feeding and watering sched.?
My first look said Ca/Mg def. BUT the whole area pic leaves that in doubt......So please, answer those questions and get a quality answer that you can actually USE!
Thank you.