Knowing what you were going for, it was a good idea. However, the gameplay is much too long. It took hours - hours - for the thing to even sprout and I'm not willing to find out just how long it would take for it to become fully grown.
Perhaps if you at least added different seeds and made it slightly more interactive and challenging. Like having to test the moisture and ph levels of the soil, controlling not only the rain but the sun exposure, too, and maybe trying to protect your flower garden from predators. Something that makes the excruciating amount of time spent just having it grow be a bit more interesting.
Patience is a virtue but the world keeps on moving and you need a game that reflects both feelings.