Hopefully I can post this here!

I got a couple 'Tricolor' sweet potato vines at the beginning of April, and I can't quite diagnose what is wrong with them. I've been bringing them inside before frosts, but they still seem to go limp under 50 degrees. Is that normal? They also have some yellowing at the base, which I thought may be because I've had them inside for the last few days because of the cold, but I'm not an ipomoea expert, so I don't know. My fear is that it's some sort of wilt disease.

Hopefully everything is fine, as anyone who has purchased from Proven Winners knows that these plants aren't exactly cheap.
(Here's the yellowing)

Cold weather is unwelcome to many morning glories, including your ornamental sweet potato, which is Ipomoea batatas. Yellowing leaves is frequently a sign of too wet soil, based on my experience. Is the soil wet?

Welcome to this group!

Yes, I've been very nervous about our way too cold nights with the sweet potatoes. The soil is wet because I had recently watered it after it dried out almost completely. The geraniums they're with are doing great, so I'm not sure what's really going on. Tuesday night will drop to 36-ish degrees, so they'll be coming back inside. Hopefully I don't completely wreck them by doing that.

CrazedHoosier said:Yes, I've been very nervous about our way too cold nights with the sweet potatoes. The soil is wet because I had recently watered it after it dried out almost completely. The geraniums they're with are doing great, so I'm not sure what's really going on. Tuesday night will drop to 36-ish degrees, so they'll be coming back inside. Hopefully I don't completely wreck them by doing that.

Let the pot soil dry out some, and re-water when it appears the foliage is wilting a little. Never fear, the foliage should grow back nicely.