Q.Brown Sago Palm
The temperature dropped to 18 degrees for two or three nights. Now the fronds on my palm are brown. Do I need to cut them all off?

Certified GKH Gardening Expert
You will need to remove the yellow and brown fronds this spring, but only those as they will not come back. Just use sharp shears to do so. Do not remove green fronds. These articles will help you as well:
https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm
https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm