En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Soaptree yucca falling over in Mesa AZ

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 - July 24, 2013

From: Mesa, AZ
Region: Southwest
Topic: Diseases and Disorders, Transplants, Cacti and Succulents
Title: Soaptree yucca falling over in Mesa AZ
Answered by: Barbara Medford

QUESTION:

My soaptree yucca is about 5 ft tall and has fallen over. Does this plant require staking for I thought not, or is something else going on with it?

ANSWER:

This USDA Plant Profile Map shows that Yucca elata (Soaptree yucca) is native to Maricopa County, AZ, so hopefully that rules out the plant being in the wrong environment. By following the link above to our webpage on this plant, you will learn that it can grow from 5 to 25 ft. tall, and there is no mention of it bending over. One of the pictures from our Image Gallery below shows a Soaptree yucca which looks to be about 5 ft. tall. Here are the growing conditions for this succulent:

"Growing Conditions

Water Use: Low
Light Requirement: Sun
Soil Moisture: Dry
CaCO3 Tolerance: High
Cold Tolerant: yes
Soil Description: Well-drained soils. Gypseous, Sandy, Sandy Loam, Medium Loam.
Conditions Comments: State flower of New Mexico."
Two of those conditions that we would emphasize is that it needs "Sun" which we consider to be 6 hours or more of sun a day and the requirement for well-drained sandy soils. However, we think we may have finally found a possible answer to your question. If this yucca was transplanted into the spot where it is growing now, you should read this article by the USDA Forest Services on Yucca elata (Soaptree yucca):
"Soaptree yucca is difficult to transplant. Campbell and Keller reported that only 25% of soaptree yucca transplants survived due to taproot breakage. Soaptree yucca has been transplanted to revegetate highway rights-of way, but there was great expense in removing entire roots, as is required for successful planting. Successful transplanting of yuccas (an unspecified amount of which were soaptree yucca) has been done; plants were removed with as little root damage as possible and immediately watered when replanted."
Apparently the Soaptree yucca is rooted by rhizomes (like the underground roots of some grasses).
From the same article:
"Like all yucca species with dehiscent fruits, soaptree yucca is rhizomatous. The species is unique in that the rhizome develops downward and later begins lateral root extensions. The "vertical rhizome" as described by Webber commonly grows to 3-5 feet (1-1.5 m) deep, and 3-6 inches (8-15 cm) in diameter. Lateral roots are 6-10 inches (15-20 cm) long and 1-3 inches (2.5-8 cm) in diameter."
We can only assume that some of the rhizomes were damaged or destroyed in transplanting and, like a great tree blown down in a hurricane, the supports simply failed. If our supposition is true, we frankly see no remedy. The plant cannot live long on its side.
 

From the Image Gallery


Soaptree yucca
Yucca elata

Soaptree yucca
Yucca elata

Soaptree yucca
Yucca elata

More Transplants Questions

Transplanting Sideroxylon lanuginosum in Austin
August 12, 2009 - I have a tall (30-40 ft) Sideroxylon lanuginosum in my backyard. Last fall hundreds of saplings popped up in my yard following runners from the tall tree. I would like to keep a few of these sapling...
view the full question and answer

Transplanting native azaleas in South Carolina
June 09, 2005 - When is the best time to transplant azaleas in South Carolina Low Country?
view the full question and answer

Transplanting Cornus sericea by sprouts in Maryland
November 21, 2008 - I would like to transplant suckers of a red-twig dogwood (Cornus sericea). When is the best time to do it (before or during dormancy)? How big of a root system does each sucker need to survive? Where ...
view the full question and answer

Transplanting blue agave pups in Arizona
February 03, 2009 - I have a blue Agave with lots of pups, how do I transplant a few pups into planters. What kind of soil and how much water will they need?
view the full question and answer

Mexican Plum not doing well in Liberty Hill, TX.
September 03, 2010 - Two summers have passed since I planted my Mexican Plum. It's in full sun. It seems to have added height but not much width. It's virtually a 7 foot stick with 1 foot branches from top to bottom. 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
© 2014 Lady Bird Johnson Wildflower Center