Thank you very much, Fruitnut. Unfortunately, not only I can't do anything to aid the drainage (I planted them on my lawn which is level), I just mulched the darn things this past weekend. I'll remove the mulch tomorrow and start praying. Thank you for your advice on rootstocks. I have not paid much attention to them before. I will do now. I just plan to plant a new peach tree (TangOs) on a mound next year following Olpea's system. It looks like I may need to plant a few more new peach trees if it does not stop raining anytime soon.

I agree with the two posters...I think the ones you're losing are the mature leaves, these do yellow and drop as they are replaced by new growths. Mine does the same thing usually when I have a growth flush. New leaves will harden off and darken in a few weeks. If it were my tree, I would taper off on the watering to every 3-4 days now...for about a week or two unless you get rain. By appx. 3 months I would water once every 5 days or so till you're tree gets a little more established(usually around 6 months) Nothing beats rain water to get those nice growth flushes...so much better than hose water. I would wait till its at least 6 weeks then I would "very" lightly fertilize. Either some Milorganite(or slow release) or Fish emulsion diluted. Mango trees are susceptible to fertilizer burn(leaves and roots) if given too much or too strong of a fertilizer...so add half of the recommended dosage. Don't put the granular fertilizer near the trunk...place it on the drip line...Don't fertilize after the end of October once the weather starts to cool off...hopefully by Dec or Jan. you might get some blooms? Just my advise... Good luck! Your tree looks nice and healthy!

I was following the directions given by the nursery, but I think I will water every other day this week and then next week only 3 times. Thanks for the advice! LOL...a huge downpour is just starting, so Monday it is.

Here's a good link on soils for citrus trees. There's also a decent discussion by Al on here of soils, but I don't have that link. https://www.fourwindsgrowers.com/blogs/four-winds-growing/soil-mix. Four winds also has some other good information for growing citrus indoors. I prefer mixes that have pumice in place of pearlite and recycled forest products in place of the peat as they seem to do better for trees and other plants, but it's really personal preference. If you can, I would allow for a temperature drop at night for the trees, citrus tend to like a temperature drop of about 10 degrees at night. Indoors I would also get an oversized drip tray, fill it with lava rock or other large rock (this is decorative, so it really depends on your style, what you want is rocks large enough to allow all the water from watering to drain into the bottom tray without touching the bottom of your pot, so that the water doesn't reabsorb into the soil. You could also use pot feet inside the tray and it would do the same thing). What this does is it allows for an increase in humidity around the tree as the water evaporates without needing to use a humidifier. It can really help to have. And when I say oversize, I mean for a 14 inch pot you want at least a 20 inch tray. For my big citrus I use steel trays on rubber castors, for my smaller ones I just use the standard vinyl drip trays. A bigger tray also works well, if your tree does well, catching the occasional leaf and spent flowers so they don't wind up on your floor.