Potting healthy plants in dirty containers invites disease pathogens. Scrub used pots inside
and outside with a soft brush using a solution of mild dish washing detergent and warm water.
Place small plastic pots on the top shelf of the dishwasher for an even more thorough cleaning.
Remove the crusty residues from fertilizer salts by wetting them with vinegar and scrubbing
with a stiff brush.
To clean stained and moldy terra-cotta pots simply soak them in a solution of 1 part household
bleach to 9 parts water for a few minutes. Air-dry and rinse in clean water.
To clean pots containing plants, cover the plant with a paper or plastic bag. Spray the bleach
solution on outer pot surfaces rather than dipping it. Allow to dry and then rinse. Scrub
stubborn spots gently with a vegetable brush while rinsing.