Best spot: Direwind Cliffs. Inside the cave system to the north ( down below the gates leading to Ashengate). A named spawns there : Moldmaster Ganjii (
http://everquest.allakhazam.com/db/npc.html?id=22699 ). This NPC has 5 flowers around it called a Darkroot orchid. As long as the Moldmaster is alive, the orchids repop instantly. Just put your back to the named, keep off damage shields and you can kill the orchids forever.