Contact Us Host an Event Volunteer Join

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Friday - November 20, 2009

From: Gilbertsville, PA
Region: Mid-Atlantic
Topic: Non-Natives
Title: Problems with non-native nectarine in Gilbertsville PA
Answered by: Barbara Medford

QUESTION:

I live in southeastern Pennsylvania. I have a mature nectarine tree maybe 14 years old. It has a greenish grey spotting on the trunk and branches, the fruit always turns into the brown mummies and for many years has had leaf curl. I used a product called Serenade biofungicide and this year there was no curl but all fruits were mummies. Is it worth trying to save this tree? What would help it if I prefer not to spray chemicals that would be toxic to birds, critters, water supply. Thanks!

ANSWER:

The Lady Bird Johnson Wildflower Center is dedicated to the growth, propagation and preservation of plants native not only to North America but to the area in which they are being grown. Prunus persica var. nucipersica is native not to Persia (now Iran), as the name implies, but to Central and southern Asia, specifically China. Apparently most of the nectarines, which is really just a smooth peach, sold commercially are grown in California. They are considered hardy to USDA Hardiness Zones 5 to 8. Montgomery County, PA appears to be in Zone 6, so the temperatures should not be a factor. The peach and nectarine are very susceptible to a number of serious disease problems, including peach leaf curl, brown rot, bacterial leaf spot and canker. Since it is non-native and therefore out of our range of expertise, we suggest you contact the Penn State Cooperative Extension Office for Montgomery County to see if they have any suggestions for treatment. 

 

More Non-Natives Questions

Getting Rid of Firecracker Flower
July 16, 2015 - We live in the Tampa area of Florida. We planted Russelia equisetiformis under some palm trees 10 years ago. It has grown deep among the palm tree roots. We want to kill the Russelia without harming ...
view the full question and answer

Non-native banana trees
June 06, 2008 - I recently planted two types of Banana trees, a Darjeeling and a Giant Nepal. I know that both are hardy to my zone 7 but that the Nepal needed heavy mulching. My first question is how long will it ta...
view the full question and answer

Difference between invasive Chinese and Japanese wisterias and native wisteria
September 12, 2014 - Dear Mr or Ms Smarty Plants, Is there any way I can tell for sure if my wisteria is native? I bought it at a place when it was in bloom that sold a lot of native plants. I Would like to know for sure...
view the full question and answer

Non-flowering mimosas in Texas
July 08, 2008 - I have two mimosa trees, about 3 years old. Both were grown from volunteer seedlings. Neither have flowers nor have they produced seed pods. Are they too young or do they need a source of pollenation...
view the full question and answer

Competition between Horseherb and Chickweed
July 04, 2014 - Ok, sorry I did it wrong the 1st time!? I live in Houston, and I have chickens! I also have mass amounts of Horseherb, and I want to buy some chickweed seeds and plant it for my chickens! My question ...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.