ISO - Planter box advice

Good morning, I’m going to be planting a Major Wheeler and a large cedar planter. My goal is to protect the plant from excessive heat and excessive cold in the winter. Hear my questions: 1. Would lining with landscape fabric be beneficial? 2. Would adding a layer of Styrofoam lining on top of that be helpful? I would not put the Styrofoam on the bottom. 3. In the winter, I would wrap this whole thing in burlap. Is this necessary? Thank you for your input, Sofia