Looks like a papaya ....

I was going to say the same thing but waited. If it is something that you have planted in rows, 18" apart, then its got to be some garden veggies not morning glories. So, as Fatamorgana has suggested, it might be sweet potatoes. I have not seen anything other than morning glories with three-lobed leaves. Never planted sweet potatoe. Passiflora Incarnata has similar leaf shape, but I doubt that you planted that one.

Pachyphytum sp.

there is a houseplant forum .. for further learning ... if it had been taken outdoors in my MI ... 3 weeks ago ... it would have a lot more problems than yours .. cold damage ... also.. its stressed from the change of circumstances.. e.g. going from the growers greenhouse ... to the seller.. and to your house ... so a little leaf loss is not that big a deal ... also .. in fall.. many plants lose their older leaves ... due to the changing season ... anyway ... its stressed.. and not looking all that bad ... just water it properly .. and it should put out some new leaves ... and being stressed.. does not mean its hungry .. fert is not a response at this time ... if you just got it from the store.. i am sure there is enough fert in that pot for months ... in spring .. when the growing season starts.. then some fert might be helpful ... ken ps: its not suffering.. its just reacting to change .... you are suffering.. try not to love it to death ...