It got down to mid 30's.. I think it was more my fault than the weather.. Te weedmat made contact with the peppers and fried them.. I don't regret the early start just from that little incident, I still have plenty of peppers growing in cells I started in February and the tomatoes were 50�.. Really I planned to plant the 20th of this month so I got about 20 days early, next year I'll stick with my original 4/20 start date.