A. A new garden will automatically be added when a new flower has finished growing but it can't be added to any of the existing gardens because they are all full (or locked).

Alternatively, if you want the garden sooner than that, choose Add Garden from the application menu. If this menu option is disabled it means there are no more gardens to add.

When adding a new garden, you will be given the option to select from a number of different garden designs. Move left and right through the available options by swiping the screen, or tapping on the arrows. If you find a design you like simply tap on it to create a new garden. Any number of gardens with the same design may be added up to the overall maximum number of supported gardens.