I have a mixture of bone dry felled trees and freshly torn down (max 3" diameter) trees (hardwood)on my property. I am building raised vegetable beds and I was originally thinking of putting down gravel inbetween and around the beds. Now I'm wondering if I can use those dead trees/branches by renting a chipper and using it as mulch around the beds instead. I'm worried about the newer trees. I don't know if I need to dry them out or if they'll be "sappy". What is the proper course of action?