Now, onto the fun part - drying those sage leaves! You can use a few different methods, but my favorite is the air drying method. Simply tie the sage leaves in small bunches and hang them upside down in a warm, dry place - like a warm attic or sunny windowsill.
Sage Leaves Conversion To Dried at Wanda Devine blog
Another method is to use a dehydrator or your oven on the lowest temperature setting. Just be sure to keep an eye on them, so they don't get too crispy! You want to aim for a dry, crumbly texture - like the kind you find in store-bought dried sage.
And, if you're feeling extra adventurous, you can even try freezing your sage leaves! Just chop them up, place them in an airtight container or freezer bag, and you're good to go!
5 Ways to Dry Sage - wikiHow