Answer: It doesn't take long for tender plants to freeze to death when temperatures are too cold. The plants you mention are susceptible to frost but the roots may have survived. Especially the nasturtium and impatiens - they like growing in cool temperatures. I can only suggest that you cut off the obviously dead plant tops and wait to see if the roots are healthy enough to send up new sprouts. I certainly hope they are - I've lost several plants to frost and I know how devasting it can be! Let's hope for the best!
Q&A Library Searching Tips