A Japanese garden is a type of theme garden. So is an herb garden, and a rose garden, and a rock garden. A garden with only shades of blue has a theme, as does a maze, or a garden with a dozen fountains, or one with a little gnome behind every second bush. Any garden organized around some unifying idea or design is a theme garden. Types of Theme Gardens: Planning & Design Ideas | Planet Please note: You are currently browsing img garden theme photo op with that is 460x613px in size. This image is listed in garden theme decorations category. Types of Theme Gardens Planning Design Ideas Planet, 460x613 in 85.57 KB.