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 - June 12, 2008

From: Nashua, NH
Region: Northeast
Topic: Non-Natives
Title: Failure of non-native mock orange to bloom
Answered by: Barbara Medford

QUESTION:

We have a mature mock orange shrub that is very healthy but has not bloomed at all. What can we do?

ANSWER:

Since this is a non-native of North America, we do not have the Philadelphus coronarius (mock orange) in our native plant database. Our emphasis at the Lady Bird Johnson Wildflower Center is the planting, propagation and protection of plants native to North America and, indeed, to the area in which they are growing. However, we are always interested in plants, and will try to find some answers to your question about this native of southern Europe.

This site from North Carolina State University on mock orange was about the best at presenting the facts on care and appropriate conditions for this plant. The USDA Plants Profile shows it growing all the way from Georgia in the South up into far northeast Canada, including New Hampshire, so you must be in the right zone for it. One interesting fact we picked up in our research is that non-blooming mock orange can be the result of too little sun or too much fertilizer. The flowering of any plant will be affected by the application of too much fertilizer, especially high nitrogen fertilizers. At bloom time (late Spring to early Summer) you might try a shot of high phosphorus plant food. High nitrogen encourages lush leaf growth, but not blooms. Mock orange apparently does best in rich soil, well-draining, that is slightly acidic to neutral. To encourage bloom, it should be pruned right after blooming, and oldest branches should be pruned right down to ground at the same time. But, if it hasn't bloomed at all, that makes it a little difficult to know when to prune.

If you feel your plant is getting enough sun, not too much fertilizer, and the roots are in well-draining soil, we would suggest you take it out and replace it with something else that better fills that space. We haven't seen it grow in Texas (way too much sun and heat, probably), but we understand it's not a particularly handsome shrub when it's not blooming, that not all mock oranges have any or much fragrance, and it doesn't bloom very long. Why waste your time, resources, and energy on that?

 

 

More Non-Natives Questions

Hydrilla problems in Tom Bean Lake in Mesquite, TX.
October 12, 2012 - What is the lifespan of Hydrilla in 30 acre lake at Tom Bean Tx? Does it grow spring thru summer and then hibernate thru winter ??
view the full question and answer

Dry, brown leaves on non-native weeping willow
August 03, 2008 - Hello! I live in Pennsylvania I have 5 weeping willows I planted 3 years ago. All seemed well until last week I noticed suddenly one looks like it might be dying!? All the leaves are dry & brown. T...
view the full question and answer

Identity of rubbery-looking tree with long green thorns
March 21, 2012 - I am trying to identify a tree that has a green rubbery look with long, sharp, green thorns. This tree is on my property in Conroe, TX and the soil type is Gladwater clay frequently flooded.
view the full question and answer

Problems with non-native althea in Georgetown, TX
June 20, 2009 - My white althea's leaves have a white edge, last year the bloom did not open. Is it sick?
view the full question and answer

Differences between Desmodium and Lespedezda
June 19, 2014 - i am trying to determine the difference between lespedeza and desmodium in my full sun wildflower and tall grasses meadow. There appear to be a number of different types of these plants, and they are...
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