I think this is a really charming idea. It takes a topic that most people don’t know much about and turns it into something approachable and interesting. I also like that your choices have visible effects on the environment, it gives players a reason to care about making the right decisions.
One thing I’d love to see is a little more variety in the gameplay between identifying plants, just to keep each day feeling fresh. Other than that, I think it’s a thoughtful concept with a strong message and a nice, hopeful direction.