I had to cut down 4 trees last summer because they had died. I did not stump grind them yet. I was thinking could i use the method of Hugelkultur while they are still in the ground. Any experts or anyone who has done this any words of encouragement would be great. I don't want to pay for them to be grinded if i can just use them as planting beds? If i can't use this method any one have a cheap way of getting rid of them besides digging them up your self? Thanks