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
3 ratings

Friday - August 15, 2008

From: Buchanan, VA
Region: Mid-Atlantic
Topic: Non-Natives
Title: Winter care for non-native ice plant in Virginia
Answered by: Barbara Medford

QUESTION:

I have an ice plant in my garden and it is doing very well. What would be the care for winter. Ground seldom freezes, temperatures mostly 20 but can get in single digit occasionally. Very little snow and seldom lasts more than a few days

ANSWER:

We're going to name this one "The Great Ice Plant Mystery." We've heard of ice plants for years, knew they were succulents, were pretty sure they were non-native to North America, and that's about it. So, when we went looking for websites on ice plant, we had three different genus names pop up. The first one is Lampranthus, the second is Delosperma cooperi and the third is Corpobrotus chilensis or edulis. We looked at pictures of them-all very similar, with similar pinky-purple flowers, and chubby succulent leaves. We looked at descriptions-all said to be members of the Alizaceae or fig-marigold family, and all natives of South Africa. We even looked at the USDA Plant Profiles for them-they all seem to be growing only in California, or California and Washington State, or California and Florida. And in California, they are considered a noxious weed, taking over the native plant life of sand dunes, and gardeners are advised not to plant them in Zones 7-10, where they could be expected to become invasive.

So, we decided to pick one, Lampranthus, and found this Botany.com website which seems to have the best all-round information. Buchanan, in west central Virginia, appears to be in USDA Hardiness Zone 7a, with minimum average temperatures of 5 deg to 0 deg. According to the information we found, while intense and prolonged frost can cause damage, the plant will recover vigorously in the Spring. It does, however, need excellent drainage, lean soil and can tolerate considerable drought. We found one gardening forum which said ice plants grow in several places in Virginia, and it should grow in your garden, too.

The Lady Bird Johnson Wildflower Center is dedicated to the use and propagation of plants native to North America and to the area in which they are being grown. We also wish to be on guard against invasive plants, native or non-native. While this plant is considered invasive on sandy beaches in California, you probably do not have the favorable temperatures or soil to permit the ice plant to be invasive in Virginia.

 

More Non-Natives Questions

Non-native, invasive bamboo for sloped river bank in Texas?
April 01, 2010 - What type of native plants/trees/shrubs/grasses would you recommend planting on a 20 ft sloped bank on the Colorado river in Texas to prevent further erosion of the bank? How do you feel about bamboo?...
view the full question and answer

Identification of mystery tree in Huntington Beach, CA
March 25, 2015 - Have a "tree" that has grown from about 18" tall to about 10' tall in a little over a years time. It has a central trunk that is about 3/4" in diameter at it's largest. It has short thin branch...
view the full question and answer

Mediterranean Pines indigenous to Verde Valley AZ
January 01, 2012 - Are the tall, thin Mediterranean/Pencil Pines growing in the Verde Valley in Arizona indigenous to the area? They are so plentiful, but are not identified as an indigenous evergreen. If not, how did...
view the full question and answer

Problems with non-native zucchini in Muskogee, OK
July 23, 2011 - In the awful heat of this summer I am still getting zucchini to produce. But, once it grows about 3 inches, it gets yellow on the ends and dies. Am I watering it too much? (I have sprayed for bugs ...
view the full question and answer

Are Texas Sage plants being harmed by nearby Rosemary.
June 08, 2015 - For 6+ years I've been growing Rosemary shrubs interspersed with Texas Sage. For the past two years the Texas Sage has been looking sickly and have not produced any flowers and the Rosemary is becom...
view the full question and answer

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