Native Plants
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.
rate this answer
Saturday - June 11, 2005
From: Milwaukee, WI
Region: Midwest
Topic: Non-Natives, Diseases and Disorders
Title: Smarty Plants on Oleanders
Answered by: Nan Hampton and Joe Marcus
QUESTION:
I have 3 Nerium Oleanders. In the winter they come indoors, and are under grow lights. They are in big pots. We just put them outside on patio, and they don't look good. They still have green tips on some, but all leaves are medium brown/some green and crisp. What can I do to save plants, this is the first time in 3 years I have seen them this bad. Mother use to take care of the plants. Now they are mine and need help. Any suggestions?ANSWER:
It sounds like you have salt burn. This occurs when mineral salts build up in the soil from fertilizers and from watering. The salts are taken up by the plant and kill the leaf tissue which dries out, browns, and dies. To rid the plant of salts you need to water deeply and slowly to leach out the salts. Let the excess water drain out and water again. You will want to do this periodically, perhaps once a month.
You definitely want the plants inside in the wintertime since the USDA cold hardiness zones for oleanders are Zones 8-10 with an average minimum temperature of10 to 20 degrees Fahrenheit for Zone 8, which extends from around Dallas southward. Wisconsin is in Zones 3 and 4, with an average minimum for Zone 3 of -30 to -40 degrees. You can read more about the history, culture and care of oleanders from the International Oleander Society.
More Diseases and Disorders Questions
Lantanas failing to bloom, turning brown
October 06, 2007 - The lantana in my front yard does not bloom, is not overwatered but does get watered, leaves turned brown and plants generally have not grown. The lantana in the rest of the yard are in bloom and lo...
view the full question and answer
Yellowing leaves on yaupon in Ft. Worth
April 23, 2009 - I planted a Pride of Houston Yaupon Holly in January in full sun. It is blooming little white flowers right now for spring, but a lot of leaves are turning yellow. Do you know what is causing this? ...
view the full question and answer
Wound in Monterey Oak from Austin
June 20, 2012 - I have a 10 year old Monterey Oak that has developed a wound that is secreting a white bubbly substance that has attracted all the bugs, like butterfly's , pill bugs, ants, and several others I don'...
view the full question and answer
Why is my recently planted Esperanza doing poorly in Texas City, TX?
May 28, 2010 - I have an Esperanza I planted about 2 months ago. It has been doing well, except today all but one stem of the plant is wilting and the leaves are rolling. I see no bugs on the plant. Any idea what...
view the full question and answer
Brown patches on St. Augustine grass
April 24, 2009 - I have brown patches on my st. augustine grass, it looks like the grass has rotted from standing water, but the drainage is not a problem, What could it be?
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |