California Institute for Water Resources
California Institute for Water Resources
California Institute for Water Resources
University of California
California Institute for Water Resources

Compost Application Practices

To qualify for the Healthy Soils Program, compost must be applied at the following rates:

Crop Type Compost Type Short tons/acre
Annuals  Higher N (C:N < 11) 3-5
" Lower N (C:N > 11) 6-8
Perennials/Trees Higher N (C:N < 11) 2-4
" Lower N (C:N > 11) 6-8
Rangelands Lower N (C:N > 11) 6-8

If you plan to purchase compost, it must be from a state-certified facility which tests for quality and nutrient content. To see facilities near you, click here for the map of STA certified compost facilities. 

Your nearest climate-smart agriculture specialist can also provide you with more specific info on pricing, delivery, and spreading options in your area.

To see the guidelines of how to produce your own on-farm compost, or to see how the compost application rates were chosen, check out the CDFA Compost Application Rate White Paper.

Webmaster Email: faith.kearns@ucop.edu