I read an article once about how bud wood can revert to the juvenile phase, if a tree is grafted and bud wood is taken from the vigorous growth and grafted again before it can bloom. The more generations that occur without blooming, the more likely it is for the reversion to happen. I think that may be one of the issues people are dealing with if they have a tree that does not bloom for several years and then fruits normally. I suspect this may be the case with some of the newer Zill mangoes that had shortages of bud wood and high levels of demand. Some of the other trees sound like they have disease issues or another problem.
Interesting possibility......
I actually think a decrease of sunlight due to tree competition shading as the most likely reason for the delaying of bloom on my 2 of 15 sweet tart trees. But it is definitely not the problem with my phoenix tree as about 13 ft tall and about 12 ft broad planted in full sun exposure.
I am very happy that one of my favorite tasting mangos (Sweet Tart) is Also probably my most dependable producer in my yard. Nice having many delicious mangos being so easy to grow......
Updated::: Nope,,, Glen is more dependable in my yard...
IMO someone with 3 or less trees only in their yard needs to be informed of the odds of zero production for many years with some varieties. (The other answer is of course plant more trees as I have thus no problem with a year of a variety not producing)
Another tree that Alex does well with production in prior years posts is Iman Pasand....
In my yard, it flowers and sets small fruit every year. Recently I have gotten some to maturity. However all of my mature fruit are cracked.... Thus a caveat to Iman Pasand at least in my more fungus prone area.
P.S... lol.. Back to Topic::: Please post any of your consistent fruiting Failures.....