I have no garden but I love botany. It's always interesting to try and recognize plants,Pl@ntNet is a cool app that helps identify all kinds of plants and trees shrimply by taking pics,
progressively by knowing their ecology, I learnt to tell that there used to be a stream somewhere through the presence of plants, or the type of soil underneath, even guessing the cardinal directions on berry cloudy days
learning to "read" the wild landscape is so fun, especially because it combines different fields of knowledge