Host an Event Volunteer Join Tickets

Support the plant database you love!

DONATE TODAY

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 - July 29, 2005

From: Santa FE, NM
Region: Southwest
Topic: Wildflowers
Title: Deadheading or trimming back of Asclepias spp
Answered by: Joe Marcus

QUESTION:

I have some butterfly weeds (flowers) and I have heard conflicting stories as to how to cut them back. Should they be deadheaded to elongate bloom time or does that prevent any seeds from replanting? Should they only be cut back in the fall every other year? 1/3 of the way back?? Thanks!

ANSWER:

You may deadhead your butterfly weeds (Asclepias spp.) if you wish your plants to produce more flowers.

Butterfly weeds make nice cut flowers. Sear the cut end of the flower stem with a flame or dip in hot water to stop the milky sap from running. Let the second or third flush of flowers produce seed pods if you would like them to.

You should cut your butterfly weeds back by 1/3 to 1/2 in early spring before new growth begins if desired to tidy up the plant and encourage new growth. Alternatively, you may wish to wait until after the spring Monarch butterfly migration has passed and prune then.
 

More Wildflowers Questions

Creating a wildflower meadow
May 18, 2013 - I have an area 1-6 acres worth that is currently grass that I would like to overseed with wildflower seed. The local native plant nursery says that would be a waste. I don't really want to kill gra...
view the full question and answer

Where can white prickly poppy be viewed en mass from Baton Rouge LA?
January 16, 2013 - Does the center feature the native White Prickly Poppy? When is prime blooming season? Can you give me some specific locations in the area where the plant can be seen en mass and photographed? Thank...
view the full question and answer

Is Rudbeckia hirta annual, biennial... or what?
January 20, 2010 - The desciption for Rudbeckia hirta says it is biennial and blooms the second year then further down the page it says it is an annual, which is it? Will I see blooms the first or second year?
view the full question and answer

When to plant wildflowers in California
December 10, 2013 - When is the best time to plant wildflowers in California?
view the full question and answer

Seeds of mayflower
May 03, 2005 - Although I now live in Virginia, I grew up in eastern South Dakota. Several years ago while visiting SD I was walking in the pasture and noticed that many of the wild mayflowers (pasqueflowers) had ...
view the full question and answer

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