Avocado bark disease and stunted growth

brad16 says...
Yep, looks like sunburn. But on the bright side it also looks like there is a fair amount of new growth coming through.

My experience with nursery purchased avocados is that the sun just about always burns most of the foliage that grew in the nursery protected conditions. The growth that comes through afterwards in the position I put it is more suited to those conditions it is now growing in.

Your Hass looks it got a good start, possibly with a little help from the whatever is producing that bit of shade just to the left of it. All that foliage on the Hass is now shading its own stem and branches from the worst of the sun.

The Edranol looks like it struggled, but the new shoots are promising. My guess is that given time, those new shoots will provide sun hardened shade for itself and it should be happier in it current location. It may be tempting to put up a sheet of light shade cloth to protect it while it is bare, but the damage is already done and that may just prevent the new growth that is coming through from maturing into full sun hardy foliage for its position.

One thing to watch, is that sunburnt foliage is relatively easy for the tree to replace, but I have had some experience where sunburn on the stem and branches can cause problems with fungus/mould later on. That isn't necessarily the case, but I've found that the scars make it more of a likelihood. Just a suggestion for you to keep an eye on.