Grafting will give an genetically identical tree.
Seed & root cuttings are the only other way I know to propagate this plant.

When looking over their website, I get the feeling that World Tree Technologies and their products are likely to be a big fraud / scam. I don't see anything about their trees that would indicate they are anything more than just a cultivar / strain of the plain old Paulownia tomentosa (at best). They say they are not invasive but offer absolutely no proof. Their claim would certainly require such proof. They also don't list a valid cultivar name. I didn't see anything that would indicate that Empress Splendor Trees are patented. Unless you see something or know something that's not on their site, I don't think you have to worry about propagating them, but I'm not sure you'll end up with anything special if you do.

thanks guys for the posts.. I have a home with about two acres and its just grass and after I saw this picture of the empress splendor saying its 10yr old I was amassed..

http://www.farmerandrancher.com/02%20FEB%202009/Empress-rows.jpg

six year old
http://www.farmerandrancher.com/02%20FEB%202009/Picture%20021%20%28Small%29.jpg

Paulownia tomentosa is reported to be invasive (environmentally harmful because it aggressively displaces native flora and causing the death of native flora and fauna as well as causing significant economic losses) in CT, DC, GA, KY, LA, MD, NC, NJ, OR, PA, TN, VA, and WV and may also represent significant ecological and economic threats in other areas. From what I've seen, I expect Empress Splendor to be no less problematic. You might want to read the link below before planting another one of these monsters.

Here is a link that might be useful: Least Wanted: Empress / Princess Tree

brandon7, i know a lot of (Paulownia tomentosa) and its invasive issues.. but im not asking about that tree nor trying to find out about it.

...and I didn't think you were!