The problem with home composts is that they don't generate sufficient heat within to kill off the pesky seeds. In fact all my weeds go into black plastic bags (inside second, heavy-duty black plastic bags), tied up tightly and stacked out of sight on my top terrace garden. In the full sun of an Italian summer, the heat generated inside is enormous, killing off any living thing. By the next spring, I have bags of - effectively - mulch. Comes in very handy.