I have purchased both of your books and have subscribed to the online text and just wanted to tell you how much I am enjoying the materials. I have studied horticulture at the college level and I am a master gardener but your material has answered many nagging questions that I was left with. I also love that you offer online certificates. I am planning to enroll in the certificates when work quiets down. You should be commended for the work you are doing to foster the organic landscaping movement! You are a role model for the gardening world!
Jason Teare, Organic Gardener
 

As a service to our communities we have made our irrigation calculator available free of charge. This calculator is of direct benefit to anyone who designs, installs or uses irrigation systems:

  • irrigation designers
  • landscapers
  • farmers
  • homeowners


Properly calculated irrigation schedules have been shown to significantly reduce water use in the landscape. In the past these calculations have been complicated and time consuming, or required the use of expensive computer programs. Our irrigation calculator allows you to perform these calculations in minutes!

  • Use it to calculate all your irrigation schedules
  • Improve your professional image
  • Reduce watering costs
  • Improve landscape health


Here is what one irrigation expert has to say about the on-line irrigation calculator:
"Congratulations, I was pleasantly surprised. For the European Irrigation Association I developed an excel spread sheet for irrigation scheduling. Your web-calculator makes irrigation scheduling accessible to everybody. Many thanks."

Click here to go to the irrigation calculator