Hello - I have 4 pretty indoor crotons, and was looking for a medium size green plant for contrast. In the meantime, a little green plant at Home Depot caught my eye, and I bought it. The saleswoman didn't know what it was, except "it's part of our tropical plant sale". A customer standing nearby thought it was a pothos, but I can't find any pothos description/picture that seems to fit. The leaves felt kind of thin and fern-like to me, but I couldn't find a fern description/picture that fit, either. And it turns out that the leaves are not thin/uncoated - the plant just needed some water. I'm not sure how to describe how the leaves feel now - maybe a little bit waxy or leathery (smooth). I thought I'd let the plant dry out between waterings, but it starts to wilt, even when top soil is moist, and seems to need some watering every day. I sort of ruled out it being a vine, because there were some larger examples of it at the store, and they were all growing vertically. But maybe it is, or could it be a shrub? As you can see, I'm lost, so any ideas about identity, or guidance about sun/watering is appreciated. Thanks! Image link:

Looks like Penstemon digitalis, perhaps the cultivar 'Husker Red'

Thanks for the suggestions. I forgot to mention the berries were spherical and always shiny, even when black, so that rules out both Capsicum & Viburnum species shown. I think I would have remembered if the berries were purple at one point, too, so that mostly rules out Capsicum. I did find a pic of (supposedly) Solanum nigrum online that had red berries, though there were conflicting captions on the photo. Maybe my mystery bush was Solanum nigrum after all, or maybe some other species of Solanum. Here is a link that might be useful:

Don't worry. It's just transplant shock. I had the same problem last Sept when they were just planted. Now they are blooming with shinny green leaves. I have several of "Pink supreme", "white", "scarlet" flower carpets. Only one of the "white" flower carpets got a bit of powdery mildew last winter. They are such tough plants and easily to root. I dropped some cuttings to entertain my very busy toddler. Now I have several new plants!