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Avocado > Year-Round IPM Program > Late Fruit Development > Fertilization

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Avocado

Avocado leaves indicating nutrient deficiencyFertilization

How to test foliar nutrients

  • Sample and test leaf nutrients annually, during mid-August to October.
  • Collect the most recently expanded and matured leaves near terminals. This normally will be 5- to 7-month-old foliage that flushed during spring.
  • Compare laboratory test results to recommended nutrient levels.

How to fertilize

  • Fertilize if needed, generally during March to November.
  • Several nutrient sources are available.
  • Nitrogen is the most frequently applied crop nutrient.
  • Nutrients are commonly applied during irrigation, such as by chemigation or microinjection.
  • When calculating the amount of fertilizer to apply, consider other potential nutrient sources. For example, any nitrogen already present in irrigation water should be credited toward the fertilization rate.

Important links

Statewide IPM Program, Agriculture and Natural Resources, University of California
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For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/C008/m008fcfert.html revised: April 6, 2007. Contact webmaster.