On Jun 18, 8:58 am, wrote:
zap damp soil in the microwave. make sure the blower is going. INgrid

How long to sterilize a 40 lb bag?

On Mon, 16 Jun 2008 21:19:36 -0700 (PDT), Frank wrote:
Anyone ever tried using cold frames for solarizing potting
soil to kill pests such as fungus gnats? Seems simple
enough, just pop the lid and toss in a bag of soil for a
week or two.