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
1 rating

Tuesday - April 09, 2013

From: Lago Vista, TX
Region: Southwest
Topic: Cacti and Succulents
Title: Failure to bloom of red yucca from Lago Vista TX
Answered by: Barbara Medford

QUESTION:

I am in Lago Vista - trying to find out why I can't get my red yucca to bloom. The first year they were great and now after two or three years - no measurable spikes have shown up. HELP!

ANSWER:

Hesperaloe parviflora (Red yucca) is not a true yucca, but a member of the Agavaceae (Century Plant) family. It is barely possible that the first year you had the plant that it had been force bloomed, although we have no idea how you would do that to a succulent. If that were true, maybe it has not yet matured to natural  bloom stage. Under normal circumstances, it blooms red and yellow from March to July.

That is pure speculation, because we can find no other explanation; however, we can do some speculating of our own. Do you have deer in your area? We understand deer absolutely adore the blooms, and since the red yucca also attracts night-feeding moths, the deer might dine at night, and just clean the blooms right off. They won't nibble the "leaves" but they will consume the flowers. One last speculation, if you are fertilizing grass around the red yucca with a high nitrogen fertilizer (the purpose of which is to encourage the green leaves of that grass), that may cause profuse green leaf growth, using up all the energy that would go into blooms. And if the red yucca happens to be under a sprinkler system, it is probably getting too much water. We don't know if that affects the blooming, but it's not good for a desert plant.

 

From the Image Gallery


Red yucca
Hesperaloe parviflora

More Cacti and Succulents Questions

Central Texas plant to grow in cavity in cedar (Juniperus ashei)
February 27, 2010 - Is there a CenTX native that would be happy in a one-gallon cavity in a Cedar tree? I'd like to disguise an amputated limb. I'd consider a Bromeliad or Staghorn fern, but would prefer a native.
view the full question and answer

Large agave (century plant) flower stalk
June 17, 2008 - HI.I live in Blythe, Ca. and have a GIANT of an agave in my back yard. It is now over 40'high and is blooming. I first noticed the stock growing at Easter when it was about 12' high. It is now t...
view the full question and answer

Semelparous: plant that dies after reproduces. Agave and bamboo.
May 15, 2007 - There is a term for a plant who lives its life (usually more than 2 years) sends up a spectacular flowering structure, and then dies. what is that term? a certain plant that falls into that category...
view the full question and answer

What to do with bloom stalk on yucca
June 08, 2008 - Six years ago, I dug up two small narrow-leaf yuccas from a deer lease outside of Junction, Texas. I planted them in a raised bed in my yard and the smaller of the two survived and grew. To my surpris...
view the full question and answer

How to Control White Fungus on Prickly Pear Cactus?
July 04, 2013 - Is there any kind of spray for our prickly pear that will help with the white fungus that has appeared on 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