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 01, 2011

From: Austin, TX
Region: Southwest
Topic: Watering, Trees
Title: What fertlilizer for live oaks under drought conditions?
Answered by: Guy Thompson

QUESTION:

In your June 7 answer about helping live oaks survive the drought, you state that additional fertilization may help as well. What kind of fertilizer to you recommend and how should it be applied? Thanks.

ANSWER:

Tree specialists don't agree on a particular type of fertilizer, one recommending  13:13:13 (nitrogen:phosphorus:potassium), while others just say a "standard" fertilizer will suffice and still others do not mention fertilization under drought conditions.  Mr. Smarty Plants suggests an organic nitrogen (slow-release) fertilizer such as 8:2:4.  Follow the instructions on the package, but apply a fairly low amount of the fertilizer around the trees near their drip lines.  Too much fertilizer could promote new leaf formation - not good in drought times.  If the trees seem to be relatively healthy you might well delay applying the fertilizer until September, which is the normal time.

Make sure you don't use Weed-N-Feed fertilizer.  This has a herbicide that kills broad-leaf plants, including oaks!  Water the fertilizer in well after application. Hopefully there is some sort of mulch of leaves or other plant material on the soil to help retard water evaporation.

And pray for a good, slow rain.

 

More Trees Questions

Chinkapin Oak Planted Too Deep
July 15, 2014 - I planted a 15 gallon chinkapin oak last year and it's doing very well. As I didn't know that much about tree planting at that time, I planted it too deep by probably 3 inches. Is this a very seriou...
view the full question and answer

Leaves on maple turning red in June in Pittsburgh PA
August 01, 2010 - We live in PA and have a medium sized maple tree in our back yard. It is not a red maple. This year, in June, the very top of the tree's foliage turned bright red. This bright red started at the t...
view the full question and answer

Late planting plum tree from Lago Vista, TX
May 01, 2014 - I have two plum trees in plastic containers that I purchased in March. For a lot of reasons, we didn't get them planted. I have kept them alive by watering consistently, but I am now wondering what...
view the full question and answer

Tilling for grass under old live oak in San Antonio
April 15, 2012 - Hi, I have a 250+ year old Texas Live Oak. As usual, the lawn under the tree, after 18 years needs to be redone. MY QUESTION: to put down new sod the lawn company needs to till the soil about 4 t...
view the full question and answer

Replacement for a globe willow tree
July 27, 2009 - We are interested in replacing a pine tree with a globe willow because they grow fast but everything i have been reading about them scares me. is there another tree comparable to a globe willow that 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