Avocado Tree Growing Guide

Avocado Tree Growing Guide

Caring For Three-Year-Old Avocado Trees

Involves ensuring they receive a balanced mix of nutrients to support their growth and fruit production. Here’s an enriched guideline on the nutrients they might need, including the addition of compost to their diet, and the frequency of application:

  1. Nitrogen (N): Avocado trees need nitrogen for growth. A three-year-old tree typically requires about 1/4 to 1/2 pounds of actual nitrogen per year, divided into 2 to 3 applications over the growing season. It’s often recommended to use a balanced fertilizer with an N-P-K ratio (Nitrogen-Phosphorus-Potassium) like 10-10-10 or 20-20-20.
  2. Phosphorus (P) and Potassium (K): While avocados don’t require as much phosphorus and potassium as nitrogen, these nutrients are still important. Using a balanced fertilizer as mentioned will cover these bases.
  3. Zinc (Zn), Iron (Fe), Manganese (Mn), and Boron (B): These micronutrients are essential for the health of avocado trees. They are usually required in smaller quantities and can be applied through foliar sprays or by using a micronutrient blend designed for fruit trees.
  4. Calcium (Ca) and Magnesium (Mg): Adding gypsum (calcium sulfate) can help improve soil structure and provide calcium. Epsom salts (magnesium sulfate) can be used to supplement magnesium. These applications might be needed once a year or based on soil test results.
  5. Compost: Incorporating compost into your feeding regimen can significantly benefit your avocado tree. Compost improves soil structure, increases nutrient content, and enhances soil microbial life, which is vital for the health of your tree. Apply a layer of compost around the base of the tree, extending out to the drip line, at least once a year, preferably in the spring.
  6. Compost Bin: Consider making your own compost bin to create a sustainable source of high-quality compost. Use a compost starter with Bokashi inoculants, which contains a multitude of naturally occurring minerals. This method accelerates the composting process and enriches your compost with beneficial microorganisms, enhancing your avocado tree’s growth and fruit quality.
  7. Water: Avocado trees are quite sensitive to water stress, both under and overwatering. Ensure consistent watering, especially during dry periods. The amount of water will depend on your soil type and climate
  8. Mulching: Apply organic mulch around the base of your trees (keeping it away from the trunk) to help retain soil moisture, regulate soil temperature, and reduce weed competition. Mulch also gradually breaks down, adding organic matter to the soil.


  • Fertilizing: Start in the early spring and continue through the summer, stopping about 2 months before your area’s first expected frost date to prevent new growth from being damaged by cold weather.
  • Micronutrients: Apply foliar sprays of micronutrients in the early spring or as needed based on observation or soil tests.
  • Soil Amendments (Gypsum, Epsom Salts): Once a year, usually in the spring, or as indicated by soil tests.
  • Compost: Annually, in the spring, to replenish organic matter and nutrients in the soil.

Note: Performing a soil test is essential to better understand your specific soil’s needs. Soil tests can provide a detailed analysis of nutrient levels and pH, helping tailor your fertilization and amendment practices to your trees’ specific needs. Moreover, observe your trees for signs of nutrient deficiencies or excesses and adjust your practices accordingly. Consulting a local cooperative extension service or a professional arborist familiar with avocado trees in your area can also provide personalized advice.

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