I built something like this: http://solarcooking.wikia.com/wiki/… It's basically an insulated cardboard box with a clear lid and reflective sides. I can put 2 gallon pots in at a time, so it's not for large amounts; I suppose a larger version would work just as well. Temps get well over 140... Chad -----Original Message----- From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of Rodney Barton Sent: Monday, October 08, 2012 6:05 AM To: Pacific Bulb Society Subject: Re: [pbs] recycling excess soil Clever set up! I solarize 20-30 gal batches by spreading it on plastic or metal sheeting, wetting and covering with clear plastic. I leave the plastic on until it starts to degrade which is usually a few weeks. I've never measured the temp but it gets too hot to touch. I've also solarized by putting plastic down on the mix in large pots (20gal+). I know the heat is not getting very deep but assuming the pathogens/weeds would be in the upper part of the mix. Rod in North Central Texas, USA Gastil said: I am experimenting with solarizing soil. > > > ________________________________ PLEASE NOTE: The information contained in this electronic mail message is intended only for the use of the designated recipient(s) named above. If the reader of this message is not the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender by telephone or e-mail (as shown above) immediately and destroy any and all copies of this message in your possession (whether hard copies or electronically stored copies).