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

Wednesday - June 13, 2007

From: Pascagoula, MS
Region: Southeast
Topic: Cacti and Succulents
Title: Crown rot in Agave americana
Answered by: Nan Hampton

QUESTION:

My Century Plant's leaves get soft toward the base and eventually fall over and I have to cut them off. What causes this?

ANSWER:

It sounds as if your Agave americana (American century plant) has crown rot, probably from overwatering and/or inadequate drainage. The rot itself is caused by bacteria or fungus that enter the plants through wounds. In the desert bacteria may be introduced by weevils but that may or may not be the case for your plant in Mississippi. You should check the plant carefully for the agave weevil (it looks a lot like a boll weevil). If you find them, you should remove them and you might consider treating the plant with an environmentally-friendly pesticide. Most likely, yours is a fungal infection from overwatering and poor drainage. In that case, reduce your watering significantly and treat with an environmentally-friendly fungicide and hope for the best. You can read more about care for Agave.

 

From the Image Gallery


American century plant
Agave americana

More Cacti and Succulents Questions

Why are the leaves of my century plants yellowing?
June 22, 2009 - I am taking care of the Agaves (century plants) for my condo community here in Austin. They are planted in 18" or 20" pots. A couple of the plants have leaves that are yellowing around the bottom....
view the full question and answer

Saving non-native sempervivum from accidental weed killer application from Nashville TN
June 15, 2012 - How to save a 'Live Forever' plant that had weed killer put on it by mistake.
view the full question and answer

Scale on Agave attenuata from Melbourne, Australia
January 27, 2011 - I have an agave attenuata in a pot. It has been attacked by scales. I have been spraying it every 3-4 days at night with a chemical sold to me by the local gardening store. It's not helping and I am...
view the full question and answer

Growing Conditions for Yucca cernua
October 22, 2011 - Nodding Yucca or Yucca cernua: I bought many lovely plants at the Wildflower Center sale on Friday, among them, a Nodding Yucca or Yucca cernua. 24 of the 25 plants I bought are already in the grou...
view the full question and answer

Cactus failing to thrive in New York City
November 21, 2008 - My cactus seems to be either weak or dying. Its long stems are bending and softer than the rest. What is happening to it?
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center