Just start today to unwrap few palms at my home. All palms with the wrapping method survived the worst winter we ve had in 20 years

The trick is : need to protect the fronds to touching the cold tarp by adding 2-3 inches fiberglass insulation and a low wattage heat cable.
The damage that Trachy had this winter was due to the fronds touching the cold tarp, before i added the fiberglass insulation. If i was doing that in november, probably the palm was nt have any damage. I cut no fronds on it since last spring. It has more damage last spring with the old wrap method.
The Needle palm has a lot of burned leaves, that one was protected with C9 and has no fiberglass insulation. So, next time i will protect all palms with the following method.
So, the wrapping works like this :
DEL lights cordon on T3 (30 feets for 8-9 feets palm) located near the crown and 12 feets heatcable around the trunck on the ground with his own thermostat. Then wrap with vapor barier insulation, not to tigh. After that, wrap again with 2-3 inches fiberglass insulation then wrap with tarp. Make sure to make 2 holes in the wrapping, one at the side at the top of the trunck and one at the top of the wrapping. That will allow some air ventilation and prevent fungus problems.
Like that it should work even at -30c temp.
Ben



