I really do love this idea! Sprout Robot is a website that, if you sign up, can tell you when to plant seeds based on your zip code. They can also send you the seeds when its time to plant (at a cost, of course).

They don't seem to have the cheapest seeds, but its a useful site and service for us gardening newbies that are just learning.

Check out these other websites if you want to purchase cheaper seeds: http://www.territorialseed.com, http://www.johnnyseeds.com, http://cooksgarden.com, http://gurneys.com and http://parkseed.com

I have never heard of this before, I prefer to go off of my own timetable. I know many people like the robots or programs because it helps to get the information in front of them. However, if you have some nice weather it is best to take advantage of this while you can!