I always just throw out my coffee grounds, in the filter. They go straight into the garbage can. recently, I found out that someone I know places them in a ziploc bag, zips it, and then places that in the garbage. Someone else dumps the grounds down the sink, rinses the filter, and then places the filter in the garbage can.

I've been tempted to save them when I'm planting things, but I usually just pick up a bag or two at Starbucks and use those.

What do you do with coffee grounds?