First, find a container that has ample drainage holes in the bottom. Fill the container half way with moist potting mix and add water until it is fully soaked. Place your hostas in the container and sprinkle some dry leaves on top of them so they will remain damp throughout the process. Fill the rest of your container with more moist potting mix and water so that it stays moist as well but don't drown your plants in too much water.