Was Cardamine hirsuta Sterilising potting mixture
Jane McGary (Wed, 03 Apr 2013 11:33:21 PDT)

Roland wrote,

Depending on what is in your potting mixture, this seems like a
dangerous experiment. Mine contains pumice, which would probably
explode if microwaved. Some contain Perlite, which would probably
melt if not explode. It would probably be all right to microwave very
clean peat or leafmold, but as with heating it in the kitchen oven,
it would smell bad. If I need to sterilize soil, which I rarely do, I
pour boiling water through it.

Kathleen's idea of using a steam mop on weeds is brilliant, I am
going to buy one.

Jane McGary
Portland, Oregon, USA