Our summer containers are gone, our fall containers won’t be looking so good after a hard frost. Empty them out and clean them for next year. Reusing old potting mix may seem the frugal thing to do, but it not built to last for years and may harbor diseases or insect eggs. Toss it and clean the container by brushing out the remaining soil and then washing it in a 10% bleach solution (a cup of bleach to a half gallon of water). Allow it to dry and then store it in a garden shed, garage or basement and you are ready to plant it again in the spring.