Have a thin layer of white mold growing all over outside clay flower pots?

what is it why is it there how do I get rid of it

Have a thin layer of white mold growing all over outside clay flower pots?
its not mold- it salt deposits from water. a scrub brush and white vinegar will do the trick.
Reply:10% bleach solution, dip a rag and wipe down the outside of the pots. they're probably unglazed and the ceramic holds moisture. tada mold
Reply:don't know why or what but try sipmly soapy water three times a week. it worked for me, or extra concentrated tea. Normal english tea.