I can burn anything green. Start with a feedsack and a few dry(er) pieces of wood that are smaller than 2 feet cut up small. Twigs and small brush. Use a little diesel to burn and heat up the fire and just hand add small pieces....if the kindling fire starts dying down, 1 splash of diesel will produce enough heat tonget it going. Fires need heat and burning diesel will get the heat up to further dry out the wood that will eventually burn to get the hot coals going. Keep pushing the brush down onto the fire and use anything to keep putting weight on the smaller brush onto the hottest part of the fire. Eventually you can add bigger pieces.
Takes time and a little effort. I like to burn as i go. Too big of a pile is impossible to start. Keep pushing together. I have the most trouble with stumps because there is plenty of dirt and i dont have an excavator to dump the largest stumps on the hottest part of the fire. But not uncommon when i get a big fire going to have it burn for 3 or more days.