Explore Plants

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
    
 

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

Sunday - July 10, 2011

From: Cumbola, PA
Region: Mid-Atlantic
Topic: Non-Natives, Diseases and Disorders, Transplants
Title: Leaves browning on non-native willow from in Cumbla PA
Answered by: Barbara Medford

QUESTION:

We recently planted a willow tree. A lot of the leaves turned yellow and some turned brown, but it is also getting some new buds. my question is, should I take the dead leaves off or leave them there?

ANSWER:

How do we feel about the willow? Let us count the ways.  While there are some members of the Salix (willow) native to North America, landscape willows are most often either Salix matsudana (Globe Willow) or Salix x sepulcralis (Weeping Willow). We have been asked about both trees numerous times, and we can only remind you that the Lady Bird Johnson Wildflower Center is dedicated to the growth, propagation and protection of plants native not only to North America but to the areas in which those plants grow natively. Here are extracts from two of our many answers on questions regarding these trees:

Non-native to the United States, Salix x sepulcralis is a hybrid of a Chinese species (Peking willow) and a European species (white willow), and is said to grow in Zones 5 to 8 in the United States. It is weak-wooded, fast-growing and, therefore, short-lived. It has aggressive roots, can lift sidewalks and interfere with sewer lines, often growing on soil surfaces, making a problem with mowing. It is susceptible to a number of pests and diseases, and notorious for littering the ground beneath it. You might check out this University of Florida Extension website on Weeping Willows for more information as well as this Q&A from North Dakota State University Extension on weeping willows.

Salix matsudana, Globe Willow, is a native of eastern Asia. Willows generally are fairly weak, short-lived trees, susceptible to many insects and diseases, as well as dropping a lot of litter. The globe willow is often infected with slime flux, a bacterial disease that is soil-borne.

To answer your question, you say you have recently planted your willow. The best probability is that it is suffering from transplant shock. It may have been planted in weather too hot or too cold for the exposed roots, damaged in transportation, or in the wrong soils for it. If it is putting on new buds, we would say just let the browning leaves drop off on their own.

 

More Non-Natives Questions

Removal and disposal of very invasive non-native water hyacinth
September 07, 2007 - I was given some Eichhornia crassipes, don't know how to care for them. Do you put them in some potting soil then put the pot in water? When do they bloom? Can they stay in the water during winter in...
view the full question and answer

Dietes bicolor invasive from Brisbane Australia
April 01, 2013 - We have dietes bicolor growing in our garden. I am changing the type of garden and cannot seem to kill it. I've dugged it out, spent too many weekends pulling out every new shoot, used poison, but t...
view the full question and answer

Lantana in hanging basket not blooming in Dover PA
June 23, 2010 - We have a lantana Bandana trailing gold in a hanging planter in full sun. It hardly blooms. Any suggestions?
view the full question and answer

Thinning of non-native rosemary
May 09, 2007 - I live in NW Austin and have a very large rosemary bush that is having problems this season. We trimmed the bush in early March because the plant was getting too large for the space. It is roughly 3...
view the full question and answer

Problems with non-native windmill palm in Eden NY
May 29, 2009 - I have a potted windmill palm, about two weeks after being potted the leaves are turning yellow with brown spots on them. what have I done wrong?
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.