there are a few spots of Irish Moss in the thyme, i've tried to keep it apart but it likes to mingle and does better with the companion on that clay. it came in with the thyme in the pots from the greenhouse and i weeded it out at first not knowing what it was, and then i moved some of it and tried to isolate it better to be able to see how it did. it did ok for two seasons but the third one it did not do well at all but the remaining small patches survived so now we'll see how benign neglect turns out...