This is fairly easy. As long as you have Chilly Pepper unlocked, you can put it into your plant selection. Its only negative is that it wastes a seed slot, a Chilly Pepper, and sun. Because of this, it is best to waiting until you need Chilly Pepper to unlock this achievement.
Freezer burn is a condition that occurs when frozen food has been damaged by dehydration and oxidation, due to air reaching the food.