Get ready for spring by emptying and cleaning flower pots. Scrape them with a stiff brush, then soak them for 10 minutes in a 10% bleach solution to remove built up salts and diseases. Soak clay pots for 10 minutes in clear water, and thoroughly dry ( in the sun). Soak clay pots before adding soil to help retain moisture on the day you plant.
To sterilize used potting mix, bake it in the oven at 200 degrees for 30 minutes. When cool or when you are ready to plant, mix in some compost and water to moisten the soil and add nutrients.