There is a program on WHYY in Philadelphia every Saturday morning from 10-11 titled 'You Bet Your Garden.' Mike McGrath is an organic gardener and he usually has a pretty good show. Just type in WHYY.org at that time and you can listen on RealAudio or your webstream. They are just finishing up a fund raiser, so the show will be a regular one. You can send him an email note at garden@whyy.org