En EspaŅol

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
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

Friday - July 11, 2008

From: Portland, OR
Region: Northwest
Topic: Diseases and Disorders, Shrubs
Title: Leaf burn on hydrangeas
Answered by: Barbara Medford

QUESTION:

What causes my leaves to burn on my healthy hydrangeas?

ANSWER:

Our first thought would be too much sunshine, as the hydrangea thrives best as an understory plant with dappled shade. However, in Portland that doesn't seem like a big danger. Hydrangeas are susceptible to sunscald, chlorosis in alkaline soils, and winter dieback. Many weak, brittle canes are easily broken in wind and ice. Forms colonies from a shallow root system. Canes can be cut to the ground every two or three years to keep the shrub smaller, but if the canes are allowed to grow, the naturally peeling bark is attractive. Pest free. Prune immediately after flowering. There are three hydrangeas native to North America, but they tend to be more in the southern United States and none are native to Oregon. If it appears that the plant is getting too much sun, give it extra water, making sure it is not standing on the roots, and try to arrange a little more shelter for the plants next summer.

If that doesn't appear to be the problem, look at this Alabama Cooperative Extension article on Diseases of Hydrangeas. There are good illustrations of each of the symptoms of the various diseases, as well as suggested treatments. And you can go to this Oregon State University Extension page and try to find out if other similar plants in your area are being similarly affected.

 

More Diseases and Disorders Questions

Anacacho orchid not leafing out in Georgetown TX
April 18, 2013 - February 2012 I planted 2 4-ft anacacho orchids which did well. This spring, they have yet to leaf out or even bud. There is green, however, when I scratch the stems and some suckers at the bottom of ...
view the full question and answer

Insect damage on possumhaw
August 12, 2012 - We planted a small possumhaw in February of this year (2012). It had leaves and some berries and was doing real well until some bug starting eating the leaves and berries. I know it is not deer becau...
view the full question and answer

Blackening of top growth of yaupon in Sunrise Beach TX
June 09, 2010 - My question regards a Will Flemming yaupon which I am thinking may be within your scope of expertise. These were recently planted under windy conditions, then hit with a neighbors antiquated jet type ...
view the full question and answer

How to correct Anacacho leaves that are turning brown and curling in Driftwood, TX?
May 11, 2012 - Anacacho lunarioides leaves are turning brown and curling,how do I correct?
view the full question and answer

Rust problems on Jack in the Pulpit in IL
June 12, 2011 - The last 2 years I have noticed that some of my jack in the pulpit plants have something that makes me think of a copper color rust.It seems to start on the underside of the leaves. What can I do to g...
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.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2015 Lady Bird Johnson Wildflower Center