Buy one perennial, get one for free at Home Depot by with the steps outlined below.

1. Sign up for Home Depot Garden Club for free.  As usual, we suggest using your secondary e-mail address instead of your primary one.
2. Check for the e-mail confirmation.  WIthin that e-mail confirmation, there is a link to "exclusive offers" as shown here.
3. Click on the exclusive offer to retrive your one-time use printable coupon as shown here.