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
Not Yet Rated

Thursday - January 01, 2009

From: Denver, CO
Region: Rocky Mountain
Topic: Propagation, Transplants
Title: Century plant offshoots in Denver
Answered by: Barbara Medford

QUESTION:

Each year I get a small "baby" Century Plants in the early winter..December - January, But it dies off before summer. We live in Denver, CO My main plant is doing fine. Also, should I cut the lower "dead" leaves? Thank you

ANSWER:

There are nine different agaves with the common name "Century Plant" in our Native Plant Database; however, none of them is shown to be native to Colorado. Just to have a reference point, we chose Agave americana (American century plant) and did some research on it. We are curious-is this plant outside or indoors or in a greenhouse? The reason we ask is that agaves cannot tolerate temperatures in the teens without damage, as they are hardy in Zones 9 to 11. Looking at the USDA Hardiness Zone Map, it looks like the area around Denver ranges from Zone 4b (average minimum temperatures -30 to -25 deg. F.) to Zone 5b (-15 to -10 deg. F.). If your agave is outside in that kind of temperatures, it must be a wonder plant. So, we're assuming you have your agave in a large pot, in a sheltered location. Under those circumstances, and just guessing, really, we would think that the "mother" plant, although putting out a sucker or adventitious shoot for propagation, really doesn't want to share the nutrients in the pot with her offspring, and thus it dies. We understand that these suckers are very easily removed by just pulling them out, and can then be planted in another pot and allowed to live and grow. Use a standard cactus potting mix, and give it a little moisture-not too much, this is a desert plant-and see how it does. Since you say this usually happens in December to January, now would be the time to watch for a shoot's appearance, and prepare to transplant.  

In answer to your question about cutting off the lower dead leaves, see this University of Colorado Cooperative Extension Service Agave americana website. Note the drawing of an agave, with lower branches or spines or whatever clipped off close to the trunk. Be prepared to protect yourself when you do so, and be advised that the sap can be allergenic, and cause severe allergic problems if it gets on the skin. Long sharp clippers, tough gloves and disposal in a heavy paper sack that the spines won't rip apart are the order of the day.

Pictures of Agave americana

 

More Transplants Questions

Timing for transplanting a yaupon in Louisiana
January 01, 2009 - I found a female yaupon growing wild at the back of my property and would like to move it to the front. When should I do this?
view the full question and answer

Damaged newly planted Gaura in Austin
April 16, 2010 - Hello yet again! This past Friday we attended the plant sale where we got lots of goodies to start a new bed. The plants were all planted on Sunday. All of them are doing fine, even beginning to...
view the full question and answer

Problem with Arizona Ash in Leander TX
March 10, 2011 - What would make my otherwise healthy Arizona Ash tree, that was doing so well last year, only bud out on just one side?
view the full question and answer

Disappearance of leaves on desert willow in Tucson AZ
August 08, 2009 - We have a Lois Adams Desert Willow (Tucson, Az). The leaves will pump out and then a day or so later, all of the leaves are gone. The only bugs we've seen on it are very, very small ants. Could this ...
view the full question and answer

Newly planted Burford Holly doing poorly in Austin, TX.
July 25, 2011 - About a month ago I bought dwarf burford holly. Now they have slowly started getting brown leaves that eventually fall off. Some of the plants have white spots on the ends. I usually check my plant...
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.