Maybe I am lame but is this the place to look? It seems we have two places/threads going at the same time to talk about this.
Personally, I still question the long term need for this as some offers are good for 'one day only' and won't be very current by the time some members get around to reading about what they missed. (Just my opinion.)
"Current Coupon Codes for Garden-Related Companies" in Co-ops, Group Buys and Classifieds forum