Answer: Avocado trees are adapted to most soil types, provided the soil has good internal drainage. The tree will not perform well in poorly drained soils, nor will it tolerate flooding. The best way to improve your soil prior to planting is to dig in a good amount of organic matter (compost, aged manure, etc.) to help loosen the soil so the roots can easily penetrate. You can use the Soil Buster, which is calcium. These gypsum pellets can simply be added to the soil around the planting hole and mixed into the soil you take from the planting hole. I'd still add some organic matter, though to make the soil rich and loose for the roots of your new tree.
Good luck with your new tree.
Q&A Library Searching Tips