B2G1 Mums for Free! Join Home Depot Garden Club! October 8, 2011 by SMFM Leave a Comment Have you joined the Home Depot Garden Club yet? Â This is a great way to get coupons, discounts and great do-it-yourself tips! Last week I got a sheet of coupons in the mail including one for Buy 2 Get 1 Pot of Mums for free!