Welcome MNJ. I've started working with ground cover to deal with weeds. They never take a break!
offdalip, what type of mango tree do you have?
All my trees are less than 2 years old: mango, cherimoya, sugar apple, jackfruit, cashew, jujube, peach, banana, carob, persimmon, spanish lime. mamey sapote, moringa, guava, white sapote...most from seed. jujube is one of the grafted ones and fruited the first year. persimmon has 3 fruit still holding on - dropping about 5.