If you live near a Home Depot you may want to consider joining their Garden Club. They frequently email printable coupons for BOGO garden items (such as Orchids, Houseplants, or Mums) and also coupons for $5 off/$50 or $10 off/$100 Lawn & Garden purchase.
http://gardenclub.homedepot.co...
Tip: Many Lowe's stores will accept these as competitor coupons!
