Thanks for this info from MoneysavingMom:
if you join the Stoneyfield customers forum (free), you'll also get a year's subscription to Organic Gardening magazine -- free!
I've read OG for years, and it's wonderful. It can jump on the 'let's-be-weird-about-green-issues' bandwagon, but it has a lot of practical, helpful information. My plants have been better for my reading OG.
Besides, how can you argue with free! But I suspect this won't last for long...