How my Sago Palm survived the cold northern winter months. I have a 30 year old potted double headed Sago Palm tree, which I put outside every spring and bring inside for winter. Last year the pot got too heavy for me to bring inside the house so I rolled it in my garage and left it in the semi-dark and cold garage below 30 degrees. I covered the lower part of the gigantic pot with a blanket to try to protect the roots from freezing. Watered it only once per month very little. In March I rolled it outside again and though the plant was dead. But it came back after fertilizing it and plenty of sunshine. It never lost any leaves nor did they turn brown during the winter. Due to their large diameter I trimmed the leaves off more then 50% before bringing it in the garage. It did not grow as large as years before but it did somehow survive the winter season in an unheated and un- protected garage. Anyway I have to do the same thing this year and hope it will survive again. Also, add some regular coffee grounds to the soil in the summer, Sago Palms like some caffeine and the bugs stay away.