If there are trichomes on the leaves they can be used to make oil or butter. There is a large number of other things that you can do with the leaves such as make smoothies out of them or simply compost them. We actually filmed an episode on From The Stash about utilizing the whole plant which will give you some more ideas. Here’s a link to the video: https://www.youtube.com/watch?v=hy7y6V_niWw
Jamaican people use them to make an aphrodisiac tea. Compost them of they have no trichomes. If they have tons of trichs then you can use them in several forms of extraction.