This is my first time designing an app interface, and I'm still learning XD – which I find lacks many of the features I'm used to using in Illustrator.
(Can you do a transparency gradient in XD?!)
I might also ever so slightly round the corners on the panels in the second screen, so that there is some relationship between the rounded buttons on the first screen.
I would like to return to this and perhaps add a 'care schedule' or 'notifications' page that would remind the user when they have to tend to their plants. Also, a 'My Plants' or 'My Garden' screen might be useful so that a user could potentially see all their plants at a glance.
I'm looking forward to receiving some feedback on these designs.