Thanks Gary!
I do have partial shade areas in my yard where I can place the pots. I intend to keep them in containers for a few months, maybe up to a year, just to see how they do in their new environment. I do have an unknown mango in the ground for about 4 years now, survived all the cold winter months here, no protection at all. But no fruits either.
It dropped all the fruits, the largest one was almost 5" when it dropped.
I do bury a few other plants, just out of laziness as I didn't want to dig an adequate hole, so I just cut off the bottom of the pot and submerged the containers (guava, figs, surinam cherry,..) Those seem to be doing fine.
Congrats, newgen. I've got 3 of your 6 varieties planted out. CC, Bombay and NamDocMai. Funny, you're the only other Bombay owner I know of in California....anyway....so much to talk about on the subject of hot and cold for growing mangoes in our extreme climate.
Not sure where to begin. As Clay mentioned my summers are more extreme than yours, and very similar to mangomaniacs'. In the desert here in Palm Springs I do have problems with a couple trees I've planted too close to walls that radiate the sun's heat. I've had to shade them just now to protect from mango fruit "burn" (believe it or not!) as I lost a bunch of smaller fruit a little while ago that I contribute to excess heat....but I digress from your original plea for help....
I've planted all my trees in native sandy soil, and mulch them on top, so it's fast draining, and yet does retain some moisture from evaporation. This time of year, when the temps are consistently near 90 I water every other day. Do NOT plant any mango trees in from of sunny Western facing walls.....they may survive but won't do much else. As someone else stated, you could water every day at this temperature or above, but the challenge is to find the right balance so your not wasting water, also. That tree that Mangomaniac posted which I guess is in Phoenix - if that truly gets watered only twice a year in addition to the scant rainfall of that region, I am thoroughly impressed and will have to rethink the amount of water I give to my largest 10 year old Manila tree.....
Now heading into winter, I know my yard's temperature variance by now, and the little mango orchard area I have in the front/side of the house is the most cold susceptible of all. There i have 5 trees that are mulched with wood chips - 4 inches thick or so - in an area about 8' x 15' that on predicted cold nights (38 or below), I water/spray the mulch the morning before so during the day, it can gain heat and release it at night. That plus being super cautious, I cover the whole area with a pvc scaffold and frost cloth. Sometimes I even leave a small heater on inside this array just to be extra safe. This last winter I was away for almost 3 weeks and left the frost cloth on the entire time and they came out unscathed. I am a real scared chicken when it comes to the cold and take extra precautions, having lost a number of trees in the early years. PVC is very cool stuff as you can assemble and un-assemble very easily and just pack it away in the springtime. As far as watering. I'm still at every other day but lower the minutes, cuz these are still 2 year old trees...
I've never really kept things in pots, so can't offer any advice there,newgen....I do know that those black pots can get real hot at 100 degrees, and the roots really wouldn't like that at all....maybe you could bury them, or at least make sure they are free of that blazing afternoon sun - but you probably know all that.....
Good luck...........Gary