The bomb squad and Seattle Fire's hazmat team were called Thursday to the Four Seasons Hotel after staff found the package and grew concerned because the shape was odd and the intended recipient unclear.
Seattle police say the pot was covered by several layers of packaging and petroleum jelly.
Police seized the marijuana for destruction. While personal possession of small quantities of marijuana is now legal in Washington, police note that six pounds is well over the legal limit.
On their website, police noted that they do not believe the package was delivered by hotel room service.