Native Plants
![](../_images/smarty_plants.gif)
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.
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.
![](../_images/mr_smarty_plants_logo_web_200w.jpg)
rate this answer
![](../_images/star_00.gif)
Sunday - February 01, 2009
From: Arlington, VA
Region: Mid-Atlantic
Topic: Shrubs
Title: Small shrubs for roof garden in Washington DC
Answered by: Barbara Medford
QUESTION:
I am looking for a hardy evergreen shrub for a roof garden in DC. Needs to be 3-4 feet tall, evergreen, dense, survive the extreme wind, cold and heat.ANSWER:
This is a tough call. The first thing that would come to mind are the conifers, which by nature are dense, wind-resistant, etc. However, they not only all grow very tall, but are difficult to transplant, and certainly would not survive long in a pot because of long taproots. The limit in height is a challenge with almost all shrubs we looked at, but many popular species are now available in dwarf or shorter versions. These are usually selections developed by nurseries from naturally shorter versions of the shrub. One of our favorite shrubs, probably because we love the name, is Arctostaphylos uva-ursi (kinnikinnick). This is low-growing, dense and evergreen, often used as a ground cover. The others are all members of the Ilex or holly genus, and all would either require extensive pruning or the use of a dwarf version to stay within your size specifications. These plants are Ilex glabra (inkberry), Ilex opaca (American holly) and Ilex vomitoria (yaupon).
You can follow the links to pages on the individual shrubs, noting their prospective heights, blooms, etc. If you have difficulty locating the plants, go to our Native Plant Suppliers section, type in the name of your town and state in the "Enter Search Location" box and you will get a list of native plant nurseries, seed companies and landscape and environmental consultants in your general area. They will have contact information so you can inquire about the availability, especially of dwarf versions.
More Shrubs Questions
Privacy screen for Canyon Lake, TX
February 07, 2014 - I need some help. I live near the Guadalupe River in Canyon Lake, TX and my backyard faces a busy street. I need a fast growing thick shrub for my backyard for privacy since I cannot afford a fence at...
view the full question and answer
Native plants with little sun and northern exposure for New York
April 26, 2006 - I live in a co-op and want to fix up the backyard. The backyard area has a west area to plant with a northern exposure and little sun and I am looking to plant something to cover the area. I would lik...
view the full question and answer
Plantings for beneath a red oak in Lubbock TX
February 23, 2012 - What would you recommend to plant in a two tiered raised bed facing west, totally blocked from the east, thus receiving only the afternoon sun? A 21 year old red oak sits in the middle of the upper ra...
view the full question and answer
Is Ilex glabra a Good Substitute Hedge for Boxwood?
November 08, 2013 - I am planning a new garden in my yard (Mercer County, NJ). My site is south-facing, average water and average soil. The aesthetic look that I want is formal; a tightly sheared hedge of small leaves ab...
view the full question and answer
Problems with a Cercis (Redbud)
August 25, 2014 - Half of my redbud tree is pooped out looking. On two places on the bark are areas where a few layers of bark have pulled back. In these areas there are white growths.
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |