You have to be a registered member on the site first.
Then everyday starting at Noon head over to Nursery Water and grab your free Nursery bag tag!
THIS CONTEST STARTS EVERY DAY AT 12-NOON EST, (11am Central, 10am Mountain, 9am Pacific). Due to the tremendous response, the daily allocation runs out quickly - usually before 1:00pm EST!
They have a counter to let you know how many tags are left for that day.