Native Plants
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Thursday - June 26, 2008
From: Woodinville, WA
Region: Northwest
Topic: Non-Natives
Title: Distressed non-native weeping willows in Washington State
Answered by: Barbara Medford
QUESTION:
What could be causing my weeping willows to be distressed year after year?ANSWER:
We have been getting a lot of questions along the same line as yours; that is, poor performance of weeping willows. We all have mental images of blue willow dinnerware, Chinese drawings and post cards of the beautiful, romantic weeping willow. Unfortunately, in real life, it doesn't do too well in most parts of North America.
Although there are 54 members of the Salix genus that are natives to North America, the weeping willow, or salix x sepulcralis, is not one of them. It is a hybrid of the Chinese Peking Willow and European white willow. This USDA Forest Service website has some more information on the weeping willow, citing the fact that it is considered invasive in several states, including Washington. The same site says that the tree is susceptible to several diseases and insect damage. The Lady Bird Johnson Wildflower Center is dedicated to the protection, planting and propagation of plants native to North America, so we do not have information on this tree in our Native Plant Database. However, we are always glad to try to provide information on plant care for plants already in the landscape.
One thing we learned is that the weeping willow is a very fast-growing tree, growing up to 8 ft. a year. It also has very brittle stems-those two factors combined can cause a tree to start to break down. Fast-growing trees are usually a bad idea, as they will age quickly and begin to deteriorate. Go to this introductory page to the Washington State University King County Extension office. There are several links and contact information for agriculture and forestry. If one of the diseases or insects that plague weeping willows is causing problems in your area, the Extension Service office should have some information on it. Here is a page of images of salix x sepulcralis.
If you are considering replacing your tree, we will try to find some suitable replacements for it. We went first to our site on Native Alternatives to Invasive Plants. We found a list of nine trees, none of which, unfortunately, are native to Washington State. We next went to our Recommended Species webpage, selected Washington and tree for our search and got eight options which we will list for you. If you decide to replace your tree with a native, go to our Suppliers list, type your city and state in the Enter Search Location box and you will get a list of native plant suppliers such as nurseries, seed companies and landscape consultants in your general area.
Betula occidentalis (water birch)
Juniperus scopulorum (Rocky Mountain juniper)
Pinus contorta (lodgepole pine)
Pinus ponderosa (ponderosa pine)
Populus tremuloides (quaking aspen)
Pseudotsuga menziesii (Douglas-fir)
Prunus virginiana (chokecherry)
Tsuga mertensiana (mountain hemlock)
More Non-Natives Questions
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May 16, 2010 - My girlfriend's Mom just planted an Acanthus in her garden. In the morning, it apparently stands up tall, but in the evening it bends over until the the leaves are lying in the dirt. She's concerned...
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Identification of spiky red berry in Connecticut
September 25, 2011 - I found an odd berry outside of my school, none of the science teachers know what it is though. It kind of looks like a spiked cherry. It has spikes on the outside, a pit on the insde, and has pinkish...
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Digging wild buttercup from roadside in Mechanicsville MD
May 28, 2012 - Mr. Smarty Plants, is it illegal to dig out wild buttercup in Maryland? I see them along the dirt road or just in the ditch. Since buttercup considered weed, I'm wondering what the law say about this...
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Do Salvia coccinea and Salvia occidentalis occur in Hawaii
April 27, 2008 - Aloha,
Would you please happen to know if the salvia occidentalis and the salvia coccinea are growing in a wild state in Hawaii, the quantity (small or large areas? What are the weather conditions ...
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Disposal of non-native chinaberry and ligustrum and their seeds
October 06, 2004 - I've got some chinaberry and ligustrum in a section of our lot that I am going to remove to make room for native plants. Both have berries, & I was wondering if running them through a chipper will ha...
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