Leaves on My Avocado Tree Turning Brown?

Needs Water and a good feeding and perhaps more space to grow!

It privacy needs a bigger pot. It is getting root bound.

It needs the soil changed it has salt burn ,the salt accumalates to much salt turning the leaves brown.Time to fertilize.You should fertilize 3 times a year.Follow it with a good watering.

You can still save the tree but you will need to dig it up again. I believe you used the same soil that was in the pot when you put it in the ground. Go get a bag of planting soil. Dig the tree up and check the roots. You can hit this on the ground several times to get the open and spread out.