Stickanswered grow question 7 years ago Hi there! Strong genetics can handle cold temperatures, as low as 50°F (10°C). Anything below will hurt the plant's tissues. However, 50°F is still under the optimal range, and may result in slow growth and bad photosynthesis, so you probably should wait another week or more depending on your local forecast. I'll be around, keep us up-to-date and good luck!