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 - November 04, 2010

From: Austin, TX
Region: Southwest
Topic: Compost and Mulch, Soils, Trees
Title: Do leaves with tannins make good compost from Austin
Answered by: Barbara Medford

QUESTION:

I have a couple of old native pecan trees in my (or neighbor's) yard that drop bushels and bushels of leaves every fall. Somewhere in the back of my mind, I have a recollection that pecan leaves have too much tannin (or something else) to make good compost. Was I dreaming? Now that I am composting everything I can lay my hands on, should I throw the pecan leaves in the pile? Thanks!

ANSWER:

First, congratulations on your composting practices; nothing is better for the environment, in our opinion. Second, there are always arguments about what is okay to compost and what is not. We found this comment from an article by Neil Sperry for the Wichita Falls, TX Times Record News:

"Leaves of oaks, pecans and walnuts all contain tannins, and there are always those out there who contend that you should not include any of these in your compost piles or in your garden soils. Let me answer from my personal experiences. I grew up in College Station, where I used post oak humus as my main source of organic matter in my gardens and greenhouse soils. It was naturally composted beyond recognition of its origin, so the tannins were of absolutely no concern. For the past 32 years, I have lived and gardened at the floor of a pecan forest, and I’m knee-deep in pecan leaves every fall. I run them through the mower, compost them, and proudly use them without any repercussions at all. Two pieces of advice: Use your mower to speed the composting along, and include other forms of organic matter in your compost pile. Decaying manure, grass clippings, “scalpings” from your first lawn mowing of the spring, etc. A combination of several forms of organic matter is always a better idea than having only one."

The message here is compost early and often and long enough to do the job. The organic matter mentioned in the excerpt contribute nitrogen and help in the "heating up" part of composting. If you don't have enough "green" material, you can buy a bag of cottonseed or alfalfa meal at the feed store, and layer your leaves with that, remembering to moisten the pile and keep turning it. By all means, don't waste those leaves!

 

More Soils Questions

Compare Natives to Lawn for Carbon Footprint Benefits in Durham, New Hampshire
September 22, 2010 - Are there carbon sequestration rate tables for turf (lawn) and bushes, shrubs, trees? I want to compare the carbon footprint benefit of lawn versus the same area put into native plantings.
view the full question and answer

Landscaping with native plants in Austin
October 06, 2005 - I'm expanding a flower bed in front of my house and would like to keep it all natives. 1) How do I find out what type of soil I should add? (I live near Hyde Park, Austin and haven't had a soil te...
view the full question and answer

Re-landscaping in Stephenville, TX.
November 17, 2012 - I prefer native plants. We are re-landsacaping, so I need grass, ground cover, vines and flowers to plant in our back yard. We have many trees and the whole yard is shady. A small area might be con...
view the full question and answer

Failure of highbush blueberry plant to produce in New Hampshire
July 25, 2008 - One of my highbush blueberry plants completely stopped producing. What can I do to revive it?
view the full question and answer

Seeding the banks of a large pond
October 18, 2011 - I have a 2 acre surface pond that is mostly a hard clay bank all around. The water level is way down and I will begin filling it very soon. I need to somehow being affordable, plant something or thing...
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