Skills 1-3 are book 1. Book 2 is skill 3-6. Book 3 is 6-10. They get a moodlet that says "above my level" if you read one that doesn't match the skill level. If it isn't working, trying opening up the cheats (control, shift and C) and type in resetsim (type sims full name here without parenthasis). 1. + XP.
For those of you (us) that like to occasionally cheat our way through, I find the quickest way to max out the gardening skill is to first have your Sim read volume one of the gardening book to bring the skill to level three. Then use buy debug to set up a nice, full garden for your Sim. If you choose to use testingcheatsenabled and make all
The Sims 3's World Adventures expansion pack also brings some exciting additions to the gardening skill. There are now ten more plants that can be grown, and a new way to use fruit. Nectar making goes amazingly well with gardening. You can turn fruit into Nectar, which will age and grow in value over time.
dcWAR.