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
Wednesday - March 25, 2015
From: Houston, TX
Region: Southwest
Topic: Non-Natives, Diseases and Disorders
Title: Mexican Lime Turning Yellow
Answered by: Anne Van Nest
QUESTION:
What causes moderate yellowing of 40% of the leaves of an 8 year old Mexican Lime Tree that is booming and blooming right now with lots of thick new growth? I used a general garden fertilizer a few weeks ago.ANSWER:
Kurt Nolte from the University of Arizona, Yuma County Cooperative Extension has an extensive webpage on Mexican Lime (Citrus aurantifolia). Since Citrus are not natives, Mr. Smarty Plants is relying on other experts to answer your question. This includes the University of California Integrated Pest Management website which has a good pictorial page about Citrus problems. Some of the problems that could cause yellowing leaves are too moist soil, nitrogen deficiency, citrus greening, manganese deficiency, potassium deficiency, iron deficiency, cold weather, and sunburn. Survey the plant to see where the yellow leaves are occurring (lower leaves, new growth) and see if your symptoms match any on the University of California page. But the good news is that your plant is blooming profusely and has lots of thick new growth.
More Diseases and Disorders Questions
Red oaks that didn't drop leaves in Austin
April 04, 2012 - I have a number of Red Oaks on land that did not drop leaves this past fall. Now these same trees seem to be dead? It seems there's some type of mold/fungus on the trees. Some trees have small patche...
view the full question and answer
Growth on trunk of Eastern Redbud
November 14, 2007 - My seven yr. old Eastern Redbud has a large patch (12x4inches) of white grey, shell or mushroom-like growth on the trunk. The bark has a wide split so the growth is on the layer of wood inside the sp...
view the full question and answer
Disease-resistant squash varieties for Central Texas
February 03, 2008 - Can you give me names of some disease-resistant summer squash varieties available in Central Texas?
view the full question and answer
Salvia, geum transplant shock symptoms
July 21, 2006 - I need some help. I transplanted 2 xeriscape plants and they are not doing
well. 1 is Pitcher Sage-sorry I don't know botanical name; the other is
White Avens. The've grown a lot but all the leave...
view the full question and answer
Safe Concrete Planters For Plants?
February 24, 2015 - We are building low concrete walls around a patio (in Washington, DC). Can we create the walls to act as planters or will the lime leaching make the soil too inhospitable for most plants?
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |