I don't dry them, but store them until a little container is full and then dump them in situ like RpR, or over the beds where the potatoes will be planted or in the compost. It does get moldy sometimes, but I drink so much coffee the container fills up fast and out it goes. I even open up any K-cups and scoop them out...then use some of those empty pods to plant seeds in. The little hole in the bottom worked great to add a small wick and make self-watering seed starters.