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| Fertilizing For the first four years, cherimoya trees should be encouraged to produce a large potential fruit bearing area on strong symmetrically spaced branches. To enhance tree growth, a good fertilizer program should be based on the results of foliar analysis from the previous autumn. To promote vigorous (but not excessive) vegetative growth, use fertilizers with a high proportion of nitrogen (N), in combination with good irrigation (if needed). If too little or too much N is applied the result can be minimal or excessive growth, which usually produces a limited harvest. Keep a careful eye on the condition of trees to make sure you’re not over-fertilizing, particularly during the summer months when too much fertilizing can be detrimental to fruit growth. For the first year an application of 15–20g urea per tree per month from leaf emergence until March is recommended. Below are the fertiliser requirements for trees two years and older. Study results recommend the following annual fertiliser application rates
* From the fifth year onwards multiply amounts by the trees age to a maximum of 12 years, then maintain at that level. N and K should be applied in two applications, half in October and January. P and S should be applied in one application in October. Cherimoya trees respond well to beneficial applications of composted organic matter and mulches, which can be applied all year. Next – nutrient disorders of cherimoya trees
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