This is what I do and the results/data.
You could use a thicker cloth there if necessary.
https://youtu.be/x5Pf_n86cZI
Now that I've watched the video and slept on it I think I will incorporate that with my smaller trees.
I watch some videos on planket Frost blankets.
Their theory is first water the soil then drape the blanket to the ground.
That is good in theory but when you're dealing with trees you might get two ends to touch the ground but the short sides not so much.
Since I use Christmas lights and need be a hundred watt flood light in the center of the tree I can use the lollipop technique.
With the number of frost alerts we've had lately and with the growing number of trees accumulated. I have to develop a very field Expedia method. With the fact that sometimes I am way too busy and other times way lazy this has to be calculated into the equation
The 10-day forecast looks to be Low's in the 50-ish in 9b