This display is called kengai zukuri, meaning "overhanging cliff form". There's a single plant in the pot, grown on a bamboo frame to give the impression of a cascade of flowers.
EXIF info:
Nikon Df
Lens: 24-70mm F/2.8G
Focal Length: 24mm
Aperture: F/6.3
Shutter Speed: 1/600s
ISO Sensitivity: ISO 400