They are usually web-based consisting exhaustive amount of information for all your gardening needs.
This free app can help you know everything about a plant by snapping a pic of the plant. It compares your photo with others in the database to offer you care tips.
This application is a database to help you identify issues with your plant. It will also help you water, fertilize, harvest, and the harvesting of the plant.
This app helps with a more edible kind of gardening. It will take you through a series of questions to coach you into the process from planting to harvesting.