I'm not familiar with those two varieties, so I'm going to assume they are either regular sweet cherries or tart cherries, and not something "exotic" like Capulin cherry that I'm not familiar with and might have different habits from the basic two cultivated species.

If so, yes, you can get the stray few blooms in the autumn from either sweet or sour cherries, generally as you say in periods of unusual weather. I remember this happening many years ago here in Michigan when we had a cold October followed by a extended period of 70 to 80 degree weather in mid-November -- among the things that popped a few random out of season blooms were cherries, plums, apricots, forsythia, witch hazels (the spring-blooming species) and flowering quince.

And, of course, there is an ornamental cherry, Prunus subhirtella autumnalis, that does bloom in the fall, and is grown just for this habit.

I'm hoping that you are just getting a few blooms, and not the entire tree popping into bloom, since they probably woulnd't make it this time of the year (perhaps they would in CA, I've never been there).

Those are very low chill sweet cherries. They don't need much to bloom. If you shocked them by transplanting and then that stress was relieved, they might well bloom some. They'll probably bloom more next spring when they should.

It can take trees awhile to learn their new environment. Be patient, they will get it figured out.

I suggest that you enjoy those blooms and not worry about it.

Why not in Los Angeles you have endless summer.

Yes, these are the new super low chill Zaiger cherry selections, they can bloom just from stress such as manual defoliation, or lack of water followed by full irrigation. Given you are in LA (no parts of Los Angeles are 8b or 9a, it's all 10a or above, you might want to correct that in your posts) you can go ahead and let them fruit, you will get an off season crop that will ripen sometimes in late December.

It's not unusual for low chill fruits to bear multiple crops per year in milder climates.

Well at least its not only me!

I live in San Bernardino county and my Asian pear, regular pear, one cherry and 2 apple trees started to drop their leaves then turned around and are starting new growth and are blooming. Arghhhh!

I have been picking the blooms off as I dont want to stress the trees since they are still young.

But I agree, the weathers been very very strange this year.

I live in San Diego and have the same two cherry trees as you. One is a Minnie Royal and the other is a Royal Lee. They too are blossoming now; however, at a reduced rate than in the spring.

I planted my trees in 2009 and recall having annual blossoming in the Spring (~April 2009, 2010) and harvest in ~mid/late May of each year. This is the first time that they have bloomed in October.

So, it may be the unusual rainy and cold weather, as you say, that is is causing the trees to bloom. Perhaps we will also have cherries in December, if we can coax any available bees to pollinate.

I'm glad to hear that it's not only my Minnie Royal and Royal Lee cherry trees that are blooming. Hope this is helpful.

They do that every year, as will a bunch of apple varieties here. Only early varieties like Anna and Dorsett Golden will give a tolerable second crop; the rest aborts once the cold weather arrives. It doesn't seem to hurt the spring crop.

Applenut