Rent Shop Volunteer Join

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Monday - March 23, 2009

From: Calgary, AB
Region: Canada
Topic: Cacti and Succulents
Title: Can I have success planting Adams Needle in Calgary, Alberta? Maybe.
Answered by: Jimmy Mills

QUESTION:

I live in Calgary, Alberta and am wondering if I could have success planting Adams Needle in this climate (lots of chinook winds in the winter with large fluctuations in temperatures).

ANSWER:

Adam's Needle Yucca filamentosa (Adam's needle) is a hardy plant that  is widely distributed in the U.S., extending north into Montana. It can be grown in USDA zones 4-9. A check of the Hardiness Zones map indicates that Calgary is in zone 3a. The average minimum temperature in zone 4 ranges from -34.4 °C to -28.9°c. The range in zone 3a is from -39.9°C to -37.3°C, so you are right on the edge in terms of temperature. The plant grows about 2-3 ft tall and 2 ft wide with a flowering stalk up to 6 ft tall. This could be a problem in strong winds.

Another Yucca, the Soapweed yucca Yucca glauca (soapweed yucca)  is similar in growth habit to Adam's Needle and naturally occurs in Alberta. It can grow in zone 3.

This link takes you to a website  with a discussion about growing these two Yuccas in Canada.

 

 

 

More Cacti and Succulents Questions

What to do about cold damage to spineless prickly pear?
March 05, 2010 - In Austin, Texas our 'spineless' prickly pear cactus is about 6' wide by 4' tall. In the last severe freeze, the top half flattened out and has remained that way. Should I cut the flattened pads o...
view the full question and answer

Freeze damage on Barrel Cactus in Llano TX
March 04, 2011 - I believe my barrel cactus has freeze damage. The flesh turned yellow and is now turning dark. The base is still green. If I cut off the damaged top portion, leaving the green base, should it survive?...
view the full question and answer

Eradicating cactus in Palo Pinto County, TX
March 30, 2010 - I live on a ranch in Palo Pinto County and would like to know how can I get rid of wild cactus.
view the full question and answer

Removal of mature agaves
November 20, 2007 - Hello- we live in Austin, TX and have a bed of different varieties of agave. They are near the walkway to our house, and are so out of control they pose a hazard to our guests walking up to the house...
view the full question and answer

Trimming damaged leaves on agaves
February 05, 2009 - Some of the leaves on my agaves are damaged. Can I cut them off? If yes, how can I prevent the wound from becoming infected? Thanks.
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.