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My research shows the species to be Penstemon.

https://www.gardeningknowhow.com/ornamental/flowers/penstemon/penstemon-beard-tongue.htm

I imagine the time indoors did not help it. Plus the water probably didn't evaporate very quickly so you may have overwatered it.

Here's an article that will help. https://www.gardeningknowhow.com/ornamental/flowers/penstemon/penstemon-beard-tongue.htm

If they are in pots they will be more vulnerable to cold so would be best brought in to an unheated conservatory or greenhouse. If in the ground they would probably be OK left out, although penstemons do vary slightly in hardiness, depending on the species. A specialist grower could supply more information. As a precaution, you could mulch the crowns with a thick layer of leafmould or compost over the winter.

Generally, the spacing will be 12 inches between each plant. This will, technically, give you room to plant two, but I would not advise this.

That container will be perfect for a single plant, but you may notice a reduction in growth and vigor when planting two to a container.

Here is an article that will help you care for the plant:

https://www.gardeningknowhow.com/ornamental/flowers/penstemon/penstemon-beard-tongue.htm

It is hardy in zones 5 to 8 and you are in hardiness zone 5. If it were in the ground it would be OK for the winter. Since it is in a pot, the roots will freeze if it doesn't get protection. You can overwinter it in a frost free area like the garage (if it is frost free) or a basement. You can also bring it indoors to a cool room near a sunny window. Water sparingly during the winter