Here is a list of resources for printable coupons. I have included coupon databases and individual companies. Most of the databases are not necessarily natural/organic specific but felt it was worth mentioning because they put these kinds of coupons up often enough. A few of the companies want you to join their community in order to receive the coupons. Please let me know if you have any questions about any of the sites. Also, let me know if a source is no longer good or if you know of one that I haven't listed.

Company Pages: Database Pages: 
Arrowhead MillsFood Lion
Cascadian FarmsKroger 
Country Choice OrganicsMambo Sprout
DreamNature's Oasis
Earthbound FarmsRecyclebank
Earth's Best OrganicTarget Coupons
Enjoy Life
Green & Black's
Green Earth Technologies
Honest Tea
Horizon Organics
Lundberg Farms
Morningstar Farms

Newman's Own Organics
Organic Valley
Pacific Foods
Pacific Foods
R.W. Knudsen
Rice Dream
Santa Cruz Organics
Seventh Generation
Silk Soy Milk
Simply Organic
Stonyfield Farms
Tribe Hummus
Turtle Mountain