I am using plantstep software, I'm just a hobby gardener and you know my garden is really small.
Since I am a programmer I never loved much Excel (I have to admit it's useful) so I wnet ahead and bought Plantstep software. IF and WHEN I remember to record the garden data the program is really useful. Maybe an excel spreadsheet give you more flexibility and you can add just the data you want, I simply can't stand scrolling lines and columns