Sago Palm Tree Temperature Cold Hardiness
Sago palm trees are very versatile and forgiving. The normal temperature range that a sago palm should be in is from 15 to 115 degrees F. Temperatures in the high teens may cause frost damage to the leaves which then in turn may turn yellow or brown. It is possible to prune or trim these to reduce stress on the plant and encourage new leaves in the spring.
When or if temperatures go below 15, the sago palm may die. However I have read that Sago Palms have survived temperature of 5 and below. As long as the trunk and leaf crown is hard wood, it should recover. If the trunk turns soft, this would be a definite indication of the sago palm being dead. I hope this is not the case for any one. I am also positive that if given some winter protection the sago palm can live in any temperature that will receive 10 degree weather through out winter. Winter protection means fertilizing in the right time. also mulching, with the wool wrap or heating pad with some sort of box over the sago. All these together and I am 100% positive your sago will survive 0 degree weather.