The answer to this question depends on the type of plant and how cold the temperature gets. If the plant is a cold-hardy variety, then it can probably withstand a night of frost without any damage. However, if the plant is not cold-hardy, then even a light frost can kill it. In general, most plants will be fine if the temperature only drops a few degrees below freezing, but anything more than that can damage or kill them. So, if you're unsure whether or not your plants can handle a frosty night, it's always better to err on the side of caution and bring them inside or cover them up just in case.