All the data you create is stores on device using what is called Swift Data (https://developer.apple.com/xcode/swiftdata/). We do not see any of your plants, images, notes, or anything else.
The instances in which we DO store data:
We store information regarding your weather alerts in order to send a ping to your phone to check your weather and notify you. This has to be done on a remote server since the app might not be open when we need to alert you of a weather event. We will never alert you outside of the weather events you set in app.
We will occasionally send anonomized analytics data to understand performance and make sure we are providing a good experience. This allows us to react quickly when things break or just understand how to build a better product for people.