Avocadoes don't get fireblight. It's not normal for an evergreen tree to lose all its leaves. Avocadoes do get root rot. The only way to know if you are watering too much or too little is to stick a trowel in the soil & look/feel. At this early stage after planting, the greatest need for moisture is in the region of the original rootball.

Well, you're in a marginal zone for avocados, and they'll certainly take some cold damage / uglification during the Winter....but they'll probably survive. If you want them looking good, bring them in as houseplants. In subsequent years, as the trunks and branches thicken, you could leave them out most of the year, I think. Josh

I don't know what's causing that texture....but it doesn't seem especially bad. You could just remove those leaves, since the plant has plenty. How are you fertilizing? The plant looks decent overall, but perhaps a few leaves are showing the first signs of a deficiency.... Josh

Yea I agree that the space would be a deciding factor on which varieties would work best. Lamb Hass for an A is a nice suggestion as it is more upright than traditional Hass. If she has plenty of room, the large spreading Fuerte is a nice option for a B. If she is more limited on space I think the more upright Sir Prize for a B would be the one to look at. I am not really sure about bloom overlap for Fuerte/Sir Prize with Hass, I think the former are more winter and the later more spring. The fruiting seasons would work well though as you could potentially have fruit year round. Kona Sharwil for the B would have the best correlation for blooming with Hass I think, plus it is a small tree. Both have long seasons at roughly the same schedule, but it will be much more difficult to find at nurseries than the others mentioned.