Gardening is a life-long pursuit - and gardens change constantly.
I was looking back through some old photos and was surprised by how different some of my flower beds look now as opposed to when we planted them a number of years ago. There were plants I'd changed out - and had forgotten about.
Documenting a garden through photos provides an historical context that reminds you how far your design skills have come, how your tastes in plants has changed and which plants work where -and which don't.
Best of all, they're just fun to look at.