BEST ANSWER: The Eucalyptus tree varies in price depending on availability and size. It's currently on back order and our sales often change every 3 to 4 days, so I can't give you a good price estimate currently.NW Iowa is in zone 5, but some of it is in zone 4. http://www.fast-growing-trees.com/ZoneMap.htm. purchased two eucalyptus trees from you around August of 2010. In the past year one of them has grown to about 7 feet tall and the other is about 5 feet tall. They are both about 6 feet in diameter. They are really doing well and growing well beyond my expectations.