I like the art style and the music. It's feels like a picture book.
It feels a little slow, as there is only one intermediate stage between planted and harvestable and also as there is only two pots at the start. This feeling is less apparent when growing the fast-growing flowers on a clear day, but it becomes noticeable with the slower flowers. This is more noticeable at the beginning where a new player may be tempted to try the more expensive slow flowers when then have fewer pots. Having more intermediate growth stages would help mitigate this feeling, and having descriptions about each flower's growth rate and sell value would help with onboarding new players.
I like that that the weather and time of day affects which plants you can grown. It would be interesting to see a mechanic where certain flowers grow better under different weather conditions aside from just having a linear scale where clear days are the best and cloudy and snowy days is the worse. I'm not sure on what the precise effects of watering, pruning, and fertilize are beyond "it helps the plant grow". Do they each provide different benefits?
The UI is functional, though it can use some improvements. I would quickly try to manage my flowers so a lot of the flower options would overlap with adjacent ones. A potential improvement would be to close the flower options when clicking a different pot. One of the plant's watering option on the upper rows could also be blocked a flower on the lower row, though this may be an issue of it being on the wrong layer.
Overall, it feels like a good start for an idle game.
A quaint flower growing game.
Edit: Forgot to finish a thought about why flower option may have been blocked.
Edit 2: I saw the screenshots and there were the sell prices and growth times! Perhaps the in-game text bugged out for me :S