It's carpet cleaning time

Once a year Pemco gets the office carpets clearned, ya know, so we can go into the new year clean.  This morning we came into the annual email announcing that and reminding us that everything needs to be off the floor before we go home for the evening.

My neighbor Carrie (you've met her before) reads the email and shouts out "oh yeeeerrrrrrr carpet cleaning time!!!  Guess I better pick up my giant bag of potting mix off the ground" Huh? Potting mix? Was this some kind of code for something else?  She couldnt possibly MEAN actual potting mix....