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
Not Yet Rated

Friday - April 24, 2009

From: Dubuque, IA
Region: Midwest
Topic: Non-Natives, Herbs/Forbs
Title: Are dusty millers perennial in Dubuque, IA?
Answered by: Barbara Medford

QUESTION:

I have dusty millers in my front yard. Last fall I did nothing with them as I wasn't sure if they will return or not. Do the dusty millers continue to grow year after year and should I cut them down or how exactly do you take care of them as far as if they come back year after year?

ANSWER:

This Floridata website Senecia cineraria says "At least 8 different garden plants are commonly called 'dusty miller'." Senecia cineraria is native to the western and central Meditteranean area and therefore not in our range of expertise. The Floridata site goes on to list the other 7 that go by the same common name. If, indeed, your plant is the Senecia cineraria, it is grown as a summer annual in cool areas, and is hardy in Zones 8 to 10. Dubuque, in central eastern Iowa,  appears on the USDA Zone Hardiness Map to be in Zones 4a to 5, with average annual minimum temperatures from -30 to -15 deg. F.  We think you will need to expect to replant them every year.

 

More Non-Natives Questions

Euphorbia 'Cherokee' leaves drying from Benson AZ
October 24, 2012 - I have a Euphorbia 'Cherokee' in a pot and has been growing nicely but some of the leaves are turning red and drying up and falling off. Is this normal for this plant?
view the full question and answer

Eradicating non-native pyracantha bushes in California
August 26, 2008 - We removed several pyracantha bushes but they keep coming up in other parts of the garden. How do we kill the shoots? Thank you for any help
view the full question and answer

Is non-native cotoneaster poisonous to goats from Eureka CA
August 19, 2011 - I have heard that cotoneaster is poisonous to goats and other animals. We are trying to get rid of it in our yard, but I was hoping we could use goats to eat it back. What are our options in removin...
view the full question and answer

Transplanting care of Mayten tree (Maytenus sp.)
November 06, 2007 - I planted a Mayten tree 2 years ago. It's about 8 feet tall. The trunk is about 1-1/2 or 2" in diameter. The earth around it sunk and now there is a "bowl" that fills with water in the rain. I...
view the full question and answer

Privacy hedge for Burleson, TX.
April 09, 2013 - I moved out to the country away from the hustle and bustle only to find that I have less privacy out there because of open land. I hear children screaming and dogs barking from 1/4 mile away. I want t...
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.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center