I have flower gardens that I want to buy a composter for and use in them. I am looking for a composter, was thinking about the tumbler type. Anyone have any suggestions? Also, I have used Terminex in the past for my pest control, and noticed that you are not to use weeds that have been sprayed in composters, so, I've now been pulling them by hand but I have taller weeds than I do grass. Can I add the weeds to the composter along with leaves? How long does it take for the weeds to break down?