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
2 ratings

Thursday - April 27, 2006

From: Round Rock, TX
Region: Southwest
Topic: Trees
Title: Fertilizer and application for live oak trees
Answered by: Dean Garrett

QUESTION:

What do I use to feed live oak trees? How do I apply the fertilzer?

ANSWER:

A standard fertilizer should be fine. One landscaper I interviewed advised an 8-2-4 compost-based fertilizer, meaning 8% nitrogen, 2% phosphorus, and 4% potassium. Others weren't so specific as to proportions, saying only "standard" or "regular."

All my informants said that if the tree is a naturally occurring specimen that has survived on its own without human intervention and still looks good, nothing may be needed. However, if the tree is now surrounded by new construction that may have damaged its roots, a fertilizer with significant phosphorus for root growth will help it adjust. Significant phosphorus will also be needed if your tree is a newly planted purchase that you want to encourage to spread its roots beyond its root ball.

All said that surface applications are best. Spread the fertilizer from near, but not on, the trunk, to a foot past the extent of the leaves.

A couple of friends of mine have maintained beautiful live oaks for two decades with little more than compost applied two or three inches thick from near the base of the tree to just past the dripline.

A deep, slow, soaking watering just after you fertilize will insure that the nutrients get to the roots. Doing it just before a good rain is even better.

Whatever you use should be applied once or twice a year. The most important time to fertilize is in early spring, just before new foliage appears, to help fuel the new growth. Though considered evergreen, live oaks (Quercus fusiformis, Quercus virginiana, or hybrids between the two) actually lose all their leaves in early to mid-spring, but the new growth appears about the same time that the old leaves drop, so most trees never look bare.

A second application in early summer can help fortify the tree during the harsh Central Texas heat.
 

More Trees Questions

Privacy screening from Prosperity SC
May 19, 2013 - I need to know what would be a good tree to plant for blocking my neighbor's home it needs to be an evergreen and slender in the space it would take.
view the full question and answer

Will wood shavings in the soil require nitrogen from Charleston MO
May 04, 2011 - I cut down a big maple tree and a lot of the wood shavings was left in the soil. I planted a flower bed over the area this spring. I later read that the wood chips in the soil would use a lot of nitro...
view the full question and answer

Problems with Ashe juniper from Lakeway TX
May 25, 2013 - Dear Sir/Madam, I have been living for the last three years in Lakeway, Texas approximately 20 miles west of Austin. In my back garden there are several ashe junipers about 15-20ft tall. However...
view the full question and answer

Bark splitting in old tulip tree in Red Creek, NY.
May 18, 2013 - Hello, We have a tulip tree that has some bark splitting I guess I would call it. The tree is older and very tall. On the north side of it starting at the bottom of the trunk to about 8-9 feet up i...
view the full question and answer

Smarty Plants on Diospyros virginiana
July 29, 2005 - Diospyros virginiana (common persimmon) is, from what I understand, a host plant for the stunning Luna Moth caterpillar which supposedly can occur this far west. Your database entry for Diospyros do...
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