Black Sapote Cultural Calendar



From the Horticultural Sciences Department, Florida Cooperative Extension Service
Institute of Food and Agricultural Sciences, University of Florida


Operation Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec.
General NPK 1 Apply NPK Apply NPK Apply NPK
Nutritional sprays 2 Apply 2 to 3 foliar nutritional sprays during the warm period of the year.
Iron applications 3 Apply iron during the warm period of the year.
Watering Water only during prolonged dry periods.  Water only during prolonged dry periods. 
Insect control Monitor for insect infestations. Contact your local county extension agent for current control recommendations.
Disease control Monitor for disease infestations. Contact your local county extension agent for current control recommendations.
Pruning Selectively prune to limit tree size and open the canopy to wind movement.
1 NPK, nitrogen-phosphate-potash. Many formulations also contain magnesium (Mg).

2 Nutritional sprays should contain manganese, zinc, and other micronutrients.

3 Dry ferrous (iron) sulfate may be applied to trees growing in low-pH soils; use chelated iron soil drenches for trees growing in high-pH soils.


Suggested Fertilizer Recommendations


Year Times per year Amount/tree/application (lbs)1 Total amount/tree/year (lbs) Minor element sprays (times/ year)2 Iron chelate drenches (oz/tree/year) 3
1 4-6 0.25-0.5 1.5-3.0 4-6 0.5-0.75
2 4-6 0.5-1.0 3.0-6.0 4-6 0.75-1.0
3 4-6 1.0-1.5 6.0-9.0 4-6 1.0-1.5
4 2-3 1.5-2.5 9.0-10.0 2-3 1.5-2
5 2-3 2.5-3.5 10.0-14.0  2-3 2-4
6 2-3 3.5-4.0 14.0-16.0 2-3 2-4
7+ 2-3 4.0-4.5 16.0-18.0 2-3 2-4
1 Use 6-6-6, 8-3-9, or a young-tree or slow-release fertilizer.

2 The sprays should contain zinc, manganese, boron, molybdenum; they may also contain iron. Foliar sprays are most efficient from April to September.

3 Iron chelate soil drenches (iron plus water) will prevent iron deficiency; foliar sprays are generally not effective. Apply soil drenches from June to September.



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Bibliography

Crane, Jonathan, H. and Balerdi, Carlos. "Black Sapote Growing in the Florida Home Garden." edis.ifas.ufl.edu. This document is HS1055, one of a series of the Horticultural Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date Nov. 2005. Revised Oct. 2006. Reviewed Nov.2009 and July 2013. Web. 16 Dec. 2014.

Published 16 Dec. 2014 LR. Last Update 25 May 2016 LR
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