En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Distribution of Non-Native Royal Empress Tree

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
1 rating

Thursday - August 23, 2007

From: Riverhead, NY
Region: Northeast
Topic: Non-Natives
Title: Distribution of Non-Native Royal Empress Tree
Answered by: Jimmy Mills

QUESTION:

I was wondering if you could give me the statistics for the Royal Empress Tree in the Long Island area. I have two and have read numerous articles online regarding them being invasive through the root system and seed pods that will sprout after the purple/blue flowers in the spring. The trees I have are approx 2 years old. What is the reproduction rate (invasiveness) on Long Island for this kind of tree? Any information you could give me regarding care, maintance, and removal would be greatly appreciated.

ANSWER:

Empress Tree (Paulownia tormentosa), aka Princess Tree, is native to China, and is distributed in 25 states in the US from Massachusetts to Florida and west to Texas. In most of its range, it is considered an invasive plant. However, the Invasive Plant Council of New York State does not list it as such, but the Invasive Plant Atlas of New England does.

As you have probably noticed from your two plants, growth is very rapid. Your plants could become reproductive in six to eight years, and at that time, each could potentially produce 20 million seeds a year. That could result in a lot of seedlings.

An article from the Plant Conservation Alliance describes the biology of the plant along with measures to control its growth. More detailed information about care of Paulownia is available at this website.

If you plan to remove your princess trees, you might consider these native alternatives:

Ilex opaca (American holly)

Cercis canadensis (eastern redbud)

Amelanchier canadensis (Canadian serviceberry)

 

More Non-Natives Questions

Research on Native vs. Non-Native Plants
October 22, 2009 - I am doing a research project on comparing and analyzing the effects of non-native plants vs. native plants on the environment and surrounding ecosystems. The end result of my project will be to desi...
view the full question and answer

Growing pecan and fruit trees near Canyon Lake, Texas
July 07, 2014 - I just bought a property on the north side of Canyon Lake in the Hill Country of Texas. Most of the trees around are cedar, and a few live oak. I know I have seen beautiful Pecan trees as well as seve...
view the full question and answer

Growing Plumeria in Ohio
July 15, 2008 - Can I grow plumeria in Ohio? We were in Hawaii this past week and I brought two plants home to try to grow. Thanks a bunch.
view the full question and answer

Clearing out non-native Himalayan blackberry
January 25, 2009 - Can you recommend a way to clear an area of Himalayan blackberry? We have cut the canes back but wish to eliminate them completely so that we can replant that area with native plants attractive to wil...
view the full question and answer

Moving School House lilies in Austin
March 02, 2009 - I live here in Austin in zipcode 78729. I have a clump of School House lilies in the back of the garden. I would like to move them to another bed under a tree. Is this a good time to move them? Should...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center