En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

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

Identification of stem from a bouquet
January 02, 2012 - I have a stem with leaves that came in a bouquet May 2011. They are still healthy in a vase of water tho they have no roots, just stem. On the back center of each leaf are protrusions half an inch lon...
view the full question and answer

Can berries of non-native Fuchsia plant be eaten from Duluth MN
August 09, 2009 - Are the berries of the Fuschia plant edible?
view the full question and answer

Non-native gardenia in Cedar Park, TX
October 07, 2009 - My gardenia, which is planted in a large pot, drops the buds before they bloom. What do I need to do. I already fertilize it with gardenia food.
view the full question and answer

Decline in non-native crape myrtles
June 15, 2007 - I live in Round Rock and the ground is rocky about one foot beneath the surface. I have about 14 crape myrtles that have been doing very well for about 6 years now. Last year the leaves on 1 started...
view the full question and answer

Flying insects eating leaves of non-native Brugmansia in Aline CA
October 17, 2013 - I have an Angel Trumpet tree. We live in Aline, California 30 miles east of San Diego. Little yellow and black flying bugs eat the leaves. Do you have a remedy for this problem.
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