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Online Courses, Books & Art

The Dirt Doctor has the following for sale online:


Sick Tree Treatment - How To Cure Your Sick Tree


Trees don’t randomly succumb to animal damage, parasites, insect pests and diseases. It happens because they are in stress and sick. Mother Nature responds by sending in the clean up crews. Pest insects and pathogens are just doing their job - trying to take out the unfit plants. Most plant sickness is environmental - too much water, not enough water, too much fertilizer, wrong kind of fertilizer, toxic chemical pesticides, compaction of soil, grade changes, ill-adapted plant varieties and/or over planting single plant species and creating monocultures, as was done with American elms in the Northwest and the red oak/live oak communities in certain parts of the South. My plan is simple. Keep trees in a healthy condition so their immune systems can resist insect pests and diseases. The Sick Tree Treatment is the best way to reverse the stress causing the issues. This course is provided by the Texas Organic Research Center.

Register for the Online Course

Natural-Organic Gardening and Landscaping Course

This gardening and landscaping course will teach you how to:

  • Identify and stop using harmful synthetic fertilizers and toxic pesticides.
  • Successfully use natural-organic techniques and products.
  • Save water and money.
  • Enjoy a more effective and healthy approach to gardening and landscaping.
Register for the Online Course

Books by Howard Garrett, The Dirt Doctor


The Natural Organic programs in Howard's books are useful to everyone, everywhere.

  • Buy books worth at least $60 or Donate $60 or more to TORC and receive a FREE One Year Membership to the Organic Club of America.
  • Buy or Donate $75 or more and receive a FREE One Year Membership, a copy of the recently updated Basic Organic Program and seeds from the Dirt Doctor's Garden. 
  • Proceeds support the Texas Organic Research Center.
Buy Howard's Books


Original Artwork by Howard Garrett

  • The proceeds from this art will support the Texas Organic Research Center.
  • Thank you very much for your donation. 
View and Purchase Howard's Art





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