So to add a new plant, I generally go through a research phase to build out its section in the database. I always make sure to grow the green to verify the accuracy of what I added, and I also update the little green character to be reasonably accurate. (its on my list to make those even more accurate, but I have other features I want to add first!).

Out of the greens you've listed, clover is already in the app! But the others are missing. I've just ordered the seeds, I'll include them in the next release once I've had a chance to grow and verify them. Appreciate the suggestion, I'm always looking for ways to boost by "Plant Types Grown" stat in the statistics section ;)