Explore Plants

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
    
 

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

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.

 

 

 

More Pruning Questions

How to prune wild mustang grape vines.
July 11, 2011 - Now that my mustang grapes are harvested. When can I trim them out of the tree top and redirect them to an arbor where I can reach them next year? The main vine is at least 3" across. The vines from...
view the full question and answer

Pruning lower branches of Cordia Boissieri from San Antonio
December 08, 2013 - My Texas Wild Olive Tree is about 6 feet high now. I bought it at the 2012 plant sale. This past summer it put on new branches near the base of the tree which I would like to cut off (to encourage u...
view the full question and answer

Will the blooming stalk of my century plant eventually tip over? Yes
June 24, 2009 - I have a century plant in bloom. Will the stalk eventually tip over? Would appreciate any Internet references on the subject.
view the full question and answer

Pruning smoketree in New Jersey
May 29, 2009 - How far from ground level do I prune a relatively young Smoke tree to get the bush effect?
view the full question and answer

Trimming bloom stalks of iris
April 15, 2008 - Mr. Smarty: I live in Nevada, and have some very beautiful Iris plants. They have all blossomed and now I am left with stems. Is there any way I can cut them back so they blossom again? If so how shou...
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.