Anyone ever hear of Ramsey Creek cemetery?
  From their literature:
 "Unfortunately modern cemeteries all too often destroy natural landscapes and chew up valuable open space: creating fertilized and herbicided, environments with dense interments and plastic flowers. A tremendous amount of money goes into expensive “leak-proof” caskets, vaults and mausoleum crypts, and to “perpetual care”.  
 Their solution:
 Burials and ashes scatterings occur in these parks, but the interments must be natural, “dust to dust” burials: ... no toxic embalming fluids, no vaults, and only biodegradable caskets.   
http://www.memorialecosystems.com/  The cemetery is basically a forest "fertilized" by the bodies and ashes.  The only thing they don't do is grow plants designed to be edible, as far as I can tell, for cultural/religious reasons I gather.