Gardens on four wheels? Some mobile gardens are on casters for portability and to chase the sun, others are traveling green roofs on the tops of busses and vans, and still others sprout in the backs of trucks.

Every year in Japan, a group of enterprising landscape artists turns the cargo beds of their tiny Kei Trucks ( kei-tora) into some very cool pop-up gardens.

The mini vehicles, used primarily for construction and agriculture, are very practical as they can easily maneuver through small side streets and are easy to park…and to garden.

Hosted by the Japan Federation of Landscape Contractors, the competition is small on limitations, but big on creativity.

Designs run the gamut from a garden seating area, a dining table with a large square planter centerpiece, an aquarium, to several “garden rooms.”

Designers create the gardens on site and judges rank the entries based on planning, expression, design, execution and environment.

The award-winning gardens are for sale, with not-so-miniature prices–they go from 250,00-700,00 yen ($2250-6300 USD.) Not a bad deal if it includes the truck.

Want to create your own solar truck garden with a miniature truck? Get one here.

Photos via Japan Federation of Landscape Contractors.