I think many of the suggestions below to improve the game are very good. I think i wanted to add visual variety of the plant and visual clarification of the soil condition. the magnifier glass and the book is the perfect tool to do this. You will wanna let the players find out the game for themselves but you have to give them some clarification. Sometimes i don't know if the soil dry or wet or in between. I also don't know what if the different of the left and center position of the pot. If only i can use magnifier glass to tell me all these. Believe me, players love to read whether it is a hint of it is a full blown page explaination. Also better to put different leaves visual and flower visual to tell the player what each plant type is.
Another thing, when i survived the winter, there was no text about what happened to my plant. A button took me to a restart game in March. I think it is better to congratulate or something. I really think this could be a good game and could scale better given some fundamental gameplay fixed.
The strongest feature of this game is the visual, like others mentioned. And I believe the visual hook can usher this game to have a price tag like $4.99 on Steam.