Very Well said Palmcity. I completely agree.
Many California mango Growers are expecting high-quality fruit from their small trees and limited root systems. My experience tells me 7-10 years is required for consistent and quality mango fruit in SoCal.
Actually, my five-year-old Manila seedling tree has a 5" lower rootstock diameter (just measured) but the Fruit punch graft is only 1" in diameter so maybe in 2-3 years it will have more girth to produce higher quality fruit.
I have enclosed a photo as a reference. To the lower left, you can see some young purple Fruit Puch fruit Developing. To the right, my Peach Cobbler graft is still flowering again but some small fruit is forming. On the top center are small Cac fruit forming.
I know my mango tree is still small but hopefully, in 3-5 years the tree will grow well and produce quality fruit.
Johnny

Manila Mango Seedling Tree with Grafts (7-9-2023)