Cute take on the theme, with great art! It does get a bit repetitive after a while, though, since the two most finicky plants died (and I kind of feel like they weren't necessarily ever saveable?) and then I had no trouble taking care of the remaining three forever. If your goal was to end up with a relaxing, mildly meditative state at the end, that's great! But if you'd like for the game to have progression/an end, maybe having the gardener take longer between each visit as the game progresses would help?
Hope you keep working on this to give it more mechanics/progression in the future :)