We get a lot of freebies in the mail. We don't drink coffee or tea, but I still get quite a few samples for it. Sometimes I use them as air fresheners or to fill decorative jars. After they've been used, I feed them to my rose bushes and viburnums. This is the only "fertilizer" these plants have received and they are doing great. I can't remember where I read that it was okay (or even good) to use them as fertilizers, but so far my plants are doing well. You can see our roses here.