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

Thursday - April 01, 2010

From: Hillsboro, OR
Region: Northwest
Topic: Diseases and Disorders, Trees
Title: Why are my lemon Cyprees trees turning Black?
Answered by: Jimmy Mills

QUESTION:

I have 3 lemon Cypress plants - all are about 6 feet tall. One of them has started turning black on one side - like it's been burnt. The inside of the plant is also turning black. I assume something is eating it from the inside out. What can I do to stop it?

ANSWER:

Lemon Cypress is a cultivar called Goldcrest or Golden Crest of  Cupressus macrocarpa (Monterey cypress). This link from Floridata provides general information about the plant.

The TopiaryShop recommends checking your plants for aphids. They secrete a substance called honeydew which can give the plant a black sooty appearance from sooty mold growing on the honeydew.

It is difficult for us to diagnose plant diseases from a distance, so I'm going to suggest that you contact the folks at the Washington County Office of the Oregon State University Extension Service for some help closer to home.

 

 

More Diseases and Disorders Questions

Smarty Plants on fungal attack
October 12, 2005 - I have three plants that have been getting fungus on their soil and I've tried to get rid of it by scraping it off, watering it less and more sunlight. It's two coleus and a begonia. I don't know...
view the full question and answer

Are brown junipers (Juniperus ashei) dead?
November 08, 2011 - If the cedar/junipers in our area are brown, will they ever come back green? Or just clear them out as dead. There are many of them due to the drought. Thank you.
view the full question and answer

Failure to bloom of Campsis radicans in Elkins WV
June 28, 2011 - Dear Mr. Smarty Plants, We live in a very cool climate of West Virginia, in the mountains, and it seems impossible for our Campsis radicans vines to flower! Perhaps the growing season is too short? W...
view the full question and answer

Controlling nematodes on lantana from San Antonio
September 19, 2012 - Can anything be done to "fix" root knot nematode on older lantana. Next to other lantana. Pull them out or try organic fix?
view the full question and answer

Problems with purple passion flower
September 04, 2007 - Hello, I live in La Place, Louisiana (30 miles west of New Orleans). In March 2007, I planted a purple passion flower (maypop). During the spring it thrived and was covered with brilliant green le...
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
© 2014 Lady Bird Johnson Wildflower Center