I just got game last night and have been up most of the night playing with my little people. I noticed with my game after I got the farming, I had two farmers water the field and within a year or two (a few minutes) they were already harvesting their crop. Which gave that darn fruit tree enough time to sprout one tiny fruit that does help out with the "food" issues.

I haven't seen or found a "potion" does that come later in the game?