AVACADO PROBLUM - Knowledgebase Question

riverside, Ca
Question by car1937
July 27, 2010
I HAVE A HASS AVACADO TREE 15YRS OLD.IT'S ABOUT 20ft TALL.I WATER IT ONCE EVERY 7 DAYS.FERTLIZE IT WITH AVACADO FOOD EVERY 4 MONTHS.LAST WEEK ALL THE AVACADS STARTED FALLING OFF THE TREE (ABOUT GOLF BALL SIZE) HELP!!!!!


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Answer from NGA
July 27, 2010

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It sounds as though the fruits were not adequately pollinated. Avocado fruit production can be helped with the presence of another avocado variety. Temperature during bloom can also influence fruit set. Optimum fruit set occurs at temperatures between about 65 - 75 F. Cooler or warmer temperatures can result in premature fruit drop. The mature avocado tree typically can produce up to about one million flowers but will only typically set about 100 to 200 fruit per tree. Sometimes they will set fruit but then drop them when they are pea to walnut sized. This is typical. You can minimize fruit drop of good "fertilized" fruit by not stressing the tree with too much or too little water. There is also some indication that overfertilizing with Nitrogen during the early fruit stages can also cause premature fruit drop. If you've always had good crops but have changed the care you give your tree, lack of pollination is the probable cause. Good luck with your avocado tree!

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