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

Tuesday - August 31, 2004

From: Philadelphia, PA
Region: Mid-Atlantic
Topic: Non-Natives
Title: Care of non-native, hybrid petunias
Answered by: Stephen Brueggerhoff

QUESTION:

I have a beautiful Petunia Tiny Tunia Violet plant which has been flowering nicely (in sun and shade environment). Suddenly, a few days ago, it began to look like it's dying--stalks all dried out. Is this normal? I have kept it moist. Should I cut it back and will it bloom next year? It is a perennial, isn't it?

ANSWER:

Hybrid garden petunias should be watered regularly, placed in well-draining, compost enriched soil. The plant may be responding to too much water; stem die-back like you have described is the result of a vascular problem, resulting from roots drying out from too little water, or root rot from too much water. The roots may also be affected by a soil fungal pathogen. If the roots die, then there is no nutrient and water delivery to the stems/vegetative tissue, causing the vegetative tissue to die. If the soil is remaining moist, allow the soil to dry out a bit and water sparingly. You may have to propagate vegetatively if the plant is in continual decline. You can reference this website for more information about petunia horticulture.
 

More Non-Natives Questions

Failure to thrive of non-native Confederate Jasmine in Tucson AZ
May 27, 2010 - My Star/Confederate Jasmine, a 30 foot long wall of it, for over 5 years now has one side of it losing leaves. I seem to remember it did this one other summer, but came back in?? What could be the pr...
view the full question and answer

Fruit trees for Buckeye AZ
May 16, 2010 - I am moving to Buckeye Az from Utah and would like to know what type of fruit trees I can grow. Thanks!
view the full question and answer

Pruning a non-native Hinoki cypress from Denver NC
July 08, 2011 - Hi! Our painters have asked that we trim the Golden Hinoki Cypress back from the house. The tree is about 20' tall, beautiful and healthy. Since it is July and therefore, HOT! I'm wondering how t...
view the full question and answer

Control of suckers on non-native crepe myrtle from Bay Point, CA
March 08, 2011 - I wrote to you a while back and haven't heard back. I wanted to know if Naphthalene Acidic Acid will keep the suckers on my Crepe Myrtle at bay? And if so, where might I find it? Thank you.
view the full question and answer

Moving non-native Iris Germanica in Pennsylvania
May 30, 2009 - I am moving from Northeast Pennsylvania to North Carolina this fall or winter. I was told it was possible to save some of my bearded Iris plants by digging them after they bloom and allowing them to ...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center