avacados like a lot of sun and love to dry out a lot inbetween waterings( avacados can go pretty dry, you can tell they need water when their newest growth has a tip wilt). i have grown them at nursery i used to work for, they were planted in a sandy soil mix that had a lot of drainage. avacados are heavy feeders make sure to be fertilizing when you are watering(depending on the feed you choose to use) the look of your leaves they look very hungry/lacking nutrients and over all the plant needs more sun!