En Español

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
1 rating

Wednesday - May 02, 2007

From: Robbinsville, NJ
Region: Northeast
Topic: Pruning, Herbs/Forbs
Title: Should black-eyed susan (Rudbeckia hirta) plants be cut back
Answered by: Nan Hampton and Joe Marcus

QUESTION:

I have black-eyed susan plants that were beautiful last year and flowered for a long time. Do they need to be cut back and if so, how much?

ANSWER:

It isn't really necessary to cut back Rudbeckia hirta (blackeyed Susan); but if you will deadhead them (i.e., remove the fading flowers before they set seed), it will prolong their flowering period.

 


Rudbeckia hirta

 

 

More Pruning Questions

Pruning Trees in Austin, TX
April 05, 2013 - I have lots of green growth sprouting on the trunks of mature trees. Should I trim them off?
view the full question and answer

What to do about volunteer trees growing beneath a large live oak tree in Austin, TX
January 08, 2013 - We have a large live oak tree. Several volunteer trees are growing directly underneath it and into its branches. I want to cut them down if they are going to hurt the long term health of the live oak....
view the full question and answer

Care for some non-native salvias from Austin
November 12, 2012 - Mexican bush sage and Salvia "indigo spires" are both blooming in my Austin beds right now. Once they stop blooming and/or frost gets them, could you tell me by how much they should be cut back? R...
view the full question and answer

Deadheading a petunia and why
July 13, 2008 - Can you please tell me the correct way to de-head a petunia and why?
view the full question and answer

Planting and care of Desert Willow in Golden Valley, AZ.
May 17, 2013 - I got a desert willow to plant in yard. Some of the leaves dried out before I could plant. Will that stop the tree from growing into a decent size tree or stay as a shrub?
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 | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center