Truffles

Question

Best way to grow truffles and avocado trees and olive trees

Answer 1

Are you referring to truffles, as in the fungus?

These articles can help you to get started with growing your trees:

https://www.gardeningknowhow.com/edible/fruits/olive/olive-tree-care-information.htm
https://www.gardeningknowhow.com/edible/fruits/avocado/avocado-tree-growing.htm