Originally Posted by siege2050

If you mean 5F degrees, you would have to wrap the pstem very heavily, but you would also have to have a tall polly tunnel if the pstem stayed intact each year. The plant would grow to full size in there. I have a greenhouse with a 11 foot roof, and stuff hits the roof come spring. I am going to try this with a few cold resistant dwarf fruiters like Raja Puri, whose leaves might still touch the top of the greenhouse, then you have a problem with sunburn, or cold burn depending on what time of the year it is when they touch the plastic.