love the bamboo and the grey.HINT: to prevent bamboos infamous spread, plant bamboo within planters. The roots are then contained and cannot form running shoots throughout your yard. and the neighbors yard.
Why not forget mowing a lawn? Convert a small yard to mostly "patio": lots of pebble w/ a few paver "rugs", edge w/ lots of green & punctuate w/ moveable potted greenery -- Designer Dominique La fourcade, one of Provence's best-known Country Garden Design