After flowering, the fruits on my mango tree all fall down when they are about an inch.

Question

My mango tree flowers every year. Have lots of fruits. But as soon as they are about an inch, they all fall down. Why?

Answer 1

I assume you are in southern california.  Mangos are very difficult to grow here in so cal and can have off years and lots of fruit drop.  You really have to work on creating the perfect microclimate for it to have success.  You may need to protect in winter. Your mango may have disease. Open one of the fruits that drops and look for worms.  This can be a very difficult problem to correct or figure out.  Feel free to post a picture as I would like to see the health of the tree.

Answer 2

Fruit trees in general are affected by major nature events like drought and excessive heat that can happen one year here then not for a few years and but seems that what your aredescribing is happening every year after the fruits have set.  Are you changing the watering pattern when the tree start to have fruits, are your fertilizing for fruit trees (bloom fertilizer).  If you tree is able to have flowers and then fruits for only a little while I would think that  the tree is pushing for production but kind of runs out of energy to take it all the way. Like swimming a mile to the beach but running out of gas two minutes before the shore.   Try this year to prune your tree, after the fruits have fallen.

Spray leaves &Trunk with with Fungicides (Chelated cooper or similar), observe leaves for any kind of pest and see to get rid of if any.  Start a 14 day cycle fruit tree fertilizer. We use 5 - 10 -15 fertilizer formula for other type of fruit trees and 8 16- 16 for the growing , non flowering season plus a small monthly application after pruning of  45 super triple phosphate. We work here in So Florida with bell pepper, guava & papaya trees and so far is has worked great;  of course climates, and different plants react different