It's going to get into the twenties here in central Florida Saturday night. mine have all taken a pretty good hit already and I found a potential solution to keep my trees warm. I did an experiment today with A-line of charcoal and I got it to burn for 6 hours On 2.5' of charcoal About 4" wide. So depending on wind I think this could be a viable tool. This is for my trees that are beyond covering And I have a few of them
