I bought my impatiens in the spring...they were a brilliant red and had blooms until late Oct.. I have them in huge, heavy clay pots on my porch. Last wk. we had our 1st frost & I covered them with sheets & they survived. I forgot to cover them the other night, & it got down to 27. The pots are really too heavy to move. Does anyone know if I should attempt to bring them in, or if they'll just die down & come back in the spring?