I keep Grow a Garden 2 notes useful by separating confirmed changes from ideas I still need to test. When a new update appears, I write down the date, the source, and the exact detail I want to verify in-game.
That avoids mixing guesses with facts, especially when several small gameplay notes are circulating at the same time. A short checklist also makes it easier to notice when an older note has become outdated.
For quick lookups, I keep this Grow a Garden 2 notes reference nearby: https://growagardens2.com/
After checking the game, I mark each line as confirmed, needs another test, or outdated. That keeps the notebook useful instead of turning it into a pile of copied claims.