I keep all the notebooks, and then I can look up what happened in other years.
I did have the Lee Valley Garden Journal--and used it for several years.
The problem with it was:- that it did not allow enough space for some gardening days.
And some pages for January were bare.
I tried spreadsheets,but when gardening I would not stop to access computer.
It does not matter if I get mud on the scrawl journals.