I am in zone 10b so my season is just about to begin. I just finished building a cinder block garden that has 3 beds. Each cinder block hole can contain a small plant so I have a ton of growing space. As I begin to plant some seeds, I am keeping a log in a gardening book and transferring the information to a spreadsheet. I decided to build a google sheet that diagrams the garden, and as you click in each square, it will tell you what it is, last fertilize date and any notes I have taken. This should be pretty easy to replicate for your own gardens and I would be happy to help. Let me know if you have any questions or suggestions on how to make it better.
Gardening Google Sheet