Help!!! Baby leaves shrivelidge on outdoor plant :(

Hi everyone..Im brand new to this forum and I am desperate for help with my sick baby (grown outdoors)...please see pics.
I am in the houston texas area and yes it is hot...could it be heat damage or nutrient based..arrrg I dont know..been searching & searching but cant figure it out.
I would so appreciate any quick advice anyone could give me as I am leaving for a week tomorrow (Jamaica..woohooo)


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