Compost Bin "fuel"

Hi guys, I was asking myself what is the best plantable "fuel" for the compost bin. I read on the wiki the list about Fill Points per item but there aren't all the plantable vegetables, just cabbage with its cores and leaves. I usually put meat inside them but hunting for wasting stuff in the compost bin seems not so much worthy since I can probably grow the "fuel" in the fields. Thanks in advance for your time and interest 
