Rent Shop Volunteer Join

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

Thursday - March 28, 2013

From: Austin, TX
Region: Southwest
Topic: Invasive Plants
Title: Is Early May OK for Roguing Bastard Cabbage?
Answered by: Joe Marcus

QUESTION:

Hi Smarty:) I'm trying to determine the window for seed set for bastard cabbage. I'm hoping to get about 250 volunteers out to remove it but the date is schedule in early May. Judging by the inflorescence now I expect seeds to set mid April?

ANSWER:

If you can schedule your volunteer event prior to early May, you'll do more good than waiting until then.  As you know, bastard cabbage (Rapistrum rugosum) is flowering now and it will soon set seed.  If you intend to cut or pull, remove and destroy the plants, then you will do more good than if you simply leave the plant lay where they are.  Early May might be too late for the latter scenario.  Pulling the plants, though much more difficult, is more effective than cutting the tops since this species will resprout and flower again after being cut.

 

More Invasive Plants Questions

Controlling Thermopsis rhombifolia (buffalo bean) in Mozambique
May 19, 2009 - Dear Mr. Smarty, Please,can you assist. We have a plot on a dam in Mozambique. It has been invaded with Thermopsis rhombifolia (we call it buffalo bean), it is very hardy and if you fall in it or j...
view the full question and answer

Does Acacia farnesiana (Huisache) have agressive roots?
November 30, 2014 - Hello, Do you know if the Huisache tree has an aggressive root system? I have a few in proximity to my septic draining field and I need to know if I should cut them down to prevent clogging of t...
view the full question and answer

Plants for slope in central Alabama
July 26, 2011 - Our home is atop a 20-25' eastern facing sandy loam slope in central Alabama. It was previously covered w/ kudzu. After 3 yrs. of eradication of the kudzu we are ready to plant with native grasses/pl...
view the full question and answer

Why is Water Hyacinth an invasive plant and Pickerel Weed isn't in Metarie, LA?
May 28, 2011 - Water Hyacinth. Would you please tell me why the Eichhornia crassipes (non-native) vs. Pickerelweed (native) is invasive vs. non-invasive? What are easy identifiers for these aquatic plants? Th...
view the full question and answer

Sources for ruellia from Houston
January 19, 2014 - I want to get a bunch of either ruellia nudiflora or ruellia drummondiana in my butterfly garden. But I cannot find it anywhere, and I have no idea where to get plants or seeds. Seems most vendors...
view the full question and answer

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