What zone does the Paulownia tree do best in?
I printed out the information for seed propagation for this tree but I can't find out which zones it does best in or else I just didn't see it. Your article states it was introduced and grew in the eastern part of the U.S. so I am guessing it will grow and thrive in Indiana.
Certified GKH Gardening Expert
A Google search reveals that the tree is hardy from USDA zones 7 to 11. Your entire state lies outside of this zone, most of which are zones 5 and 6. It will likely die every year and have to be replanted, unless you take extra steps to protect it, or plant it in container to be brought inside each year.
Paulownia is an invasive species in Indiana and much or the eastern half of the USA. So it will grow in Indiana but it is not recommended.http://www.ecosystemgardening.com/paulownia-princess-tree-on-most-hated-plants-list.html
If you give us information on what you are looking for in a tree, perhaps we can suggest an alternative.