Monkey puzzle trees are so named, I guess, because it would be a puzzle for a monkey or anything else for that matter to climb one. Those little leaflets you see in the picture are hard and sharp as knives. The mature trees are graceful and pendulous, but they are slow growing. And they are not hardy. ALSO this is one of two plants (the other is Embothrium) that I do not guarantee as they are so easy to kill. But here is one way to keep it alive: dig a hole 2′ x 1′; cut an X across the bottom of the rootcontrol bag but hold it closed until you lower the plant into the hole, then take scissors and cut down the sides of the bag multiple times and fill up the hole. Mulch and pray. zone 6